PUG-View: programmatic access to chemical annotations integrated in PubChem

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usa-input-error-message selection-validation-message"> Name must be less than 100 characters </div> </div> <div class="action-panel-control-wrap existing-collections-controls"> <label for="collections-action-panel-add-to-existing" class="action-panel-label"> Choose a collection: </label> <select id="collections-action-panel-add-to-existing" class="action-panel-selector collections-action-add-to-existing" data-ga-category="save_share" data-ga-action="select_collection" data-ga-label="($('#collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'"> </select> <div class="collections-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your collection due to an error<br> <a href="#">Please try again</a> </div> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore data-ga-category="save_share" data-ga-action="collections" data-ga-label="add"> Add </button> <button class="action-panel-cancel" aria-label="Close 'Add to Collections' panel" ref="linksrc=close_collections_panel" aria-controls="collections-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="collections" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="bibliography-action-panel" class="bibliography-action-panel action-panel in-progress-dots-panel" aria-hidden="true" data-bibliography-open-panel-enabled="false" data-bibliography-open-panel-url-hash="#open-bibliography-panel"> <div class="inner-wrap"> <h3 class="action-panel-heading"> Add to My Bibliography </h3> <form id="bibliography-action-panel-form" class="bibliography-action-panel-form action-panel-content action-form action-panel-smaller-selectors" data-add-to-bibliography-max-amount="100" data-add-to-bibliography-batch-size="10" data-bibliography-delegates-url="/list-bibliography-delegates/" data-add-to-bibliography-url="/add-to-bibliography/" data-get-article-ids-by-search-url="/get-article-ids-by-search/" data-mybib-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/mybibliography/"> <input type="hidden" name="csrfmiddlewaretoken" value="BOFnnv6rkDepSZ0fYC4eou5WDZVdFPMOLc75RhCyFWAF9HwWQugheALXC4MqmuSB"> <div class="action-panel-control-wrap bibliographies-controls"> <div class="choice-group"> <ul class="bibliographies-action-add radio-group-items"> <li> <input name="bibliography" id="my-bibliography" class="my-bibliography" type="radio" checked/> <label for="my-bibliography">My Bibliography</label> </li> </ul> </div> </div> <div class="bibliographies-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your delegates due to an error<br> <a href="#">Please try again</a> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore> Add </button> <button class="action-panel-cancel" aria-label="Close 'Add to bibliography' panel" ref="linksrc=close_bibliography_panel" aria-controls="bibliography-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="mybib" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="saved-search-action-panel" class="saved-search-action-panel action-panel " aria-hidden="true" data-saved-search-open-panel-enabled="false" data-saved-search-open-panel-url-hash="#open-saved-search-panel"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Your saved search </h2> <form id="saved-search-action-panel-form" class="saved-search-action-panel-form action-panel-content action-form" data-create-saved-search-url="/create-saved-search/" data-try-search-terms-url="/try-search-term/" data-saved-search-root-url="https://www.ncbi.nlm.nih.gov/myncbi/searches/"> <input type="hidden" name="csrfmiddlewaretoken" value="BOFnnv6rkDepSZ0fYC4eou5WDZVdFPMOLc75RhCyFWAF9HwWQugheALXC4MqmuSB"> <div class="action-panel-control-wrap"> <label for="saved-search-name" class="action-panel-label saved-search-name-label required-field-asterisk"> Name of saved search: </label> <input maxlength="200" type="text" name="saved-search-name" id="saved-search-name" class="saved-search-name" value="" required pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/"> </div> <div class="action-panel-control-wrap"> <label for="saved-search-term" class="action-panel-label required-field-asterisk"> Search terms: </label> <textarea name="saved-search-term" id="saved-search-term" class="saved-search-term" required></textarea> </div> <div class="test-search-term-wrap"> <a href="#" class="try-search-term">Test search terms</a> </div> <div class="choice-group action-panel-extra-margin-top"> <span class="action-panel-label" id="fieldset-label"> Would you like email updates of new search results? </span> <fieldset id="saved-search-alert" aria-describedby="fieldset-label"> <legend class="usa-sr-only">Saved Search Alert Radio Buttons</legend> <ul class="radio-group-items"> <li> <input type="radio" id="saved-search-alert-yes" class="saved-search-alert-yes" name="saved-search-alert" value="yes" checked> <label for="saved-search-alert-yes" class="action-panel-label">Yes</label> </li> <li> <input aria-label="No radio input" type="radio" id="saved-search-alert-no" class="saved-search-alert-no" name="saved-search-alert" value="no"> <label for="saved-search-alert-no" class="action-panel-label">No</label> </li> </ul> </fieldset> </div> <div class="alert-schedule-wrap"> <div class="action-panel-control-wrap"> <label class="action-panel-label"> Email: </label> <span aria-label="Email address" id="saved-search-email" class="action-panel-label"><span class="action-panel-label-bold"></span> (<a class="myncbi-account-settings" href="https://www.ncbi.nlm.nih.gov/account/settings/">change</a>)</span> </div> <div class="action-panel-control-wrap action-panel-extra-margin-top"> <label for="saved-search-frequency" class="action-panel-label"> Frequency: </label> <select id="saved-search-frequency" class="no-border-panel-selector saved-search-frequency"> <option value="monthly">Monthly</option> <option value="weekly">Weekly</option> <option value="daily">Daily</option> </select> </div> <div class="action-panel-control-wrap saved-search-monthly-additional"> <label for="saved-search-monthly-on-day" class="action-panel-label"> Which day? </label> <select id="saved-search-monthly-on-day" class="no-border-panel-selector"> <option value="Sunday">The first Sunday</option> <option value="Monday">The first Monday</option> <option value="Tuesday">The first Tuesday</option> <option value="Wednesday">The first Wednesday</option> <option value="Thursday">The first Thursday</option> <option value="Friday">The first Friday</option> <option value="Saturday">The first Saturday</option> <option value="day">The first day</option> <option value="weekday">The first weekday</option> </select> </div> <div class="action-panel-control-wrap saved-search-weekly-additional"> <label for="saved-search-weekly-on-day" class="action-panel-label"> Which day? </label> <select id="saved-search-weekly-on-day" class="no-border-panel-selector saved-search-weekly-on-day"> <option value="Sunday">Sunday</option> <option value="Monday">Monday</option> <option value="Tuesday">Tuesday</option> <option value="Wednesday">Wednesday</option> <option value="Thursday">Thursday</option> <option value="Friday">Friday</option> <option value="Saturday">Saturday</option> </select> </div> <div class="action-panel-control-wrap"> <label for="saved-search-report" class="action-panel-label"> Report format: </label> <select id="saved-search-report" class="no-border-panel-selector saved-search-report"> <option value="DocSum">Summary</option> <option value="DocSumText">Summary (text)</option> <option value="Abstract">Abstract</option> <option value="AbstractText">Abstract (text)</option> <option value="MEDLINE">PubMed</option> </select> </div> <div class="action-panel-control-wrap"> <label for="saved-search-amount" class="action-panel-label"> Send at most: </label> <select id="saved-search-amount" class="no-border-panel-selector saved-search-amount"> <option value="1">1 item</option> <option value="5" selected>5 items</option> <option value="10">10 items</option> <option value="20">20 items</option> <option value="50">50 items</option> <option value="100">100 items</option> <option value="200">200 items</option> </select> </div> <div> <input type="checkbox" id="saved-search-send-if-no-result" class="saved-search-send-if-no-result" name="saved-search-send-if-no-result"> <label for="saved-search-send-if-no-result" class="action-panel-label smaller-checkbox"> Send even when there aren't any new results </label> </div> <div class="action-panel-control-wrap option-text-in-email-wrap"> <label for="saved-search-email-text" class="action-panel-label"> Optional text in email: </label> <textarea name="saved-search-email-text" id="saved-search-email-text" class="saved-search-email-text"></textarea> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Saving..." data-ga-category="save_share" data-ga-action="alert" data-ga-label="save"> Save </button> <button class="action-panel-cancel" aria-label="Close 'Your saved search' panel" ref="linksrc=close_saved_search_panel" aria-controls="saved-search-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="alert" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="citation-manager-action-panel" class="citation-manager-action-panel action-panel" aria-hidden="true"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Create a file for external citation management software </h2> <form id="citation-manager-action-panel-form" class="action-panel-content action-form" action="/results-export-ids/" data-by-search-action="/results-export-search-data/" data-by-ids-action="/results-export-ids/" method="post" data-by-search-method="post" data-by-ids-method="post"> <input type="hidden" name="csrfmiddlewaretoken" value="BOFnnv6rkDepSZ0fYC4eou5WDZVdFPMOLc75RhCyFWAF9HwWQugheALXC4MqmuSB"> <input name="results-format" type="hidden" value="pubmed"/> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Sending..." data-ga-category="save_share" data-ga-action="citation_manager" data-ga-label="save"> Create file </button> <button class="action-panel-cancel" aria-label="Close 'Send citations to citation manager' panel" ref="linksrc=close_citation_manager_panel" aria-controls="citation-manager-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="citation_manager" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="rss-action-panel" class="rss-action-panel action-panel " aria-hidden="true"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Your RSS Feed </h2> <form id="rss-action-panel-form" class="rss-action-panel-form action-panel-content action-form" data-create-rss-feed-url="/create-rss-feed-url/" data-search-form-term-value=""> <input type="hidden" name="csrfmiddlewaretoken" value="BOFnnv6rkDepSZ0fYC4eou5WDZVdFPMOLc75RhCyFWAF9HwWQugheALXC4MqmuSB"> <div class="action-panel-control-wrap"> <label for="rss-name" class="action-panel-label required-field-asterisk"> Name of RSS Feed: </label> <input maxlength="200" placeholder="Name" type="text" name="rss-name" id="rss-name" class="rss-name" value='' required pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/"> </div> <div class="rss-limit-wrap"> <div class="action-panel-control-wrap action-panel-extra-margin-top"> <label for="rss-limit" class="action-panel-label"> Number of items displayed: </label> <select id="rss-limit" class="no-border-panel-selector rss-limit"> <option value="5">5</option> <option value="10">10</option> <option value="15" selected="selected">15</option> <option value="20">20</option> <option value="50">50</option> <option value="100">100</option> </select> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Creating..." data-ga-category="save_share" data-ga-action="alert" data-ga-label="save"> Create RSS </button> <button class="action-panel-cancel" aria-label="Close 'Your RSS' panel" ref="linksrc=close_rss_panel" aria-controls="rss-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="alert" data-ga-label="cancel"> Cancel </button> </div> <div class="action-panel-control-wrap rss-link-copy-wrap"> <label for="rss-link" class="usa-sr-only">RSS Link</label> <input placeholder="Your RSS Feed Link" type="text" name="rss-link" id="rss-link" class="rss-link" title="RSS Link"> <button type="button" disabled class="rss-link-copy-button disabled" data-ga-category="save_share" data-ga-action="rss" data-ga-label="copy"> Copy </button> </div> </form> </div> </div> </div> </div> <div class="article-page" id="article-page" data-article-pmid="31399858"> <aside class="page-sidebar"> <div class="inner-wrap"> <div class="full-text-links"> <div class="full-view"> <h3 class="title"> Full text links </h3> <div class="full-text-links-list"> <a class="link-item dialog-focus" href="https://dx.doi.org/10.1186/s13321-019-0375-2" target="_blank" rel="noopener" ref="linksrc=fulltextorjournal_fulltext&is_pmc=False&PrId=3055&itool=Abstract-def&log$=linkouticon&uid=31399858&db=pubmed&nlmid=101516718" title="See full text options at Springer" data-ga-category="full_text" data-ga-action="Springer" data-ga-label="31399858" ><img src="https://cdn.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--production.springer.de-OnlineResources-Logos-springerlink.gif" alt="full text provider logo"><span class="text"> Springer </span></a><a class="link-item pmc " href="https://pmc.ncbi.nlm.nih.gov/articles/pmid/31399858/" target="_blank" rel="noopener" ref="linksrc=fulltextorjournal_fulltext&is_pmc=True&PrId=3494&itool=Abstract-def&log$=linkouticon&uid=31399858&db=pubmed&nlmid=101516718" title="Free full text at PubMed Central" data-ga-category="full_text" data-ga-action="PMC" data-ga-label="31399858" ><span class="text"> Free PMC article </span></a> </div> </div> <div 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value="BOFnnv6rkDepSZ0fYC4eou5WDZVdFPMOLc75RhCyFWAF9HwWQugheALXC4MqmuSB"><div class="choice-group" role="radiogroup"><ul class="radio-group-items"><li><input type="radio" id="collections-action-dialog-new" class="collections-new" name="collections" value="new" data-ga-category="collections_button" data-ga-action="click" data-ga-label="collections_radio_new"><label for="collections-action-dialog-new">Create a new collection</label></li><li><input type="radio" id="collections-action-dialog-existing" class="collections-existing" name="collections" value="existing" checked="true" data-ga-category="collections_button" data-ga-action="click" data-ga-label="collections_radio_existing"><label for="collections-action-dialog-existing">Add to an existing collection</label></li></ul></div><div class="controls-wrapper"><div class="action-panel-control-wrap new-collections-controls"><label for="collections-action-dialog-add-to-new" class="action-panel-label required-field-asterisk"> Name your collection: </label><input type="text" name="add-to-new-collection" id="collections-action-dialog-add-to-new" class="collections-action-add-to-new" pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/" maxlength="100" data-ga-category="collections_button" data-ga-action="create_collection" data-ga-label="non_favorties_collection"><div class="collections-new-name-too-long usa-input-error-message selection-validation-message"> Name must be less than 100 characters </div></div><div class="action-panel-control-wrap existing-collections-controls"><label for="collections-action-dialog-add-to-existing" class="action-panel-label"> Choose a collection: </label><select id="collections-action-dialog-add-to-existing" class="action-panel-selector collections-action-add-to-existing" data-ga-category="collections_button" data-ga-action="select_collection" data-ga-label="($('.collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'"></select><div class="collections-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your collection due to an error<br><a href="#">Please try again</a></div></div></div><div class="action-panel-actions"><button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore data-ga-category="collections_button" data-ga-action="click" data-ga-label="add"> Add </button><button class="action-panel-cancel" aria-label="Close 'Add to Collections' panel" ref="linksrc=close_collections_panel" aria-controls="collections-action-panel" aria-expanded="false" data-ga-category="collections_button" data-ga-action="click" data-ga-label="cancel"> Cancel </button></div></form></div></div></div></div><button class="more-actions-button more-actions-dialog-trigger" title="Open dialog with more actions to take" ref="linksrc=more_actions_btn"></button><div class="display-options" 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aria-label="Toggle dropdown menu for journal Journal of cheminformatics" data-pinger-ignore> J Cheminform </button><div id="full-view-journal" class="journal-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for journal Journal of cheminformatics"><div class="title">Actions</div><div class="content"><ul class="journal-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22J+Cheminform%22%5Bjour%5D&sort=date&sort_order=desc" data-href="/?term=%22J+Cheminform%22%5Bjour%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_journal_name_link&journal_abbrev=J Cheminform" data-ga-category="search" data-ga-action="journal_link" data-ga-label="J Cheminform"> Search in PubMed </a></li><li><a class="search-in-nlm-catalog-link dropdown-block-link" ref ="linksrc=search_in_nlm_catalog_link" href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22J+Cheminform%22%5BTitle+Abbreviation%5D" data-ga-category="search_catalog" data-ga-action="journal_link" data-ga-label="J Cheminform"> Search in NLM Catalog </a></li><li><a class="add-to-search-link dropdown-block-link" ref ="linksrc=add_to_search_link" role="button" data-search-term='"J Cheminform"[jour]' data-ga-category="search" data-ga-action="add_to_search" data-ga-label='"J Cheminform"[jour]' href="#"> Add to Search </a></li></ul></div></div></div><span class="period">. </span><span class="cit">2019 Aug 9;11(1):56.</span> </div> <span class="citation-doi"> doi: 10.1186/s13321-019-0375-2. </span> </div> <h1 class="heading-title"> PUG-View: programmatic access to chemical annotations integrated in PubChem </h1> <div class="inline-authors"> <div class="authors"> <div class="authors-list"> <span class="authors-list-item "><a class="full-name" href="/?term=Kim+S&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Sunghwan Kim">Sunghwan Kim</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#full-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Thiessen+PA&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Paul A Thiessen">Paul A Thiessen</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#full-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Cheng+T&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Tiejun Cheng">Tiejun Cheng</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#full-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Zhang+J&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Jian Zhang">Jian Zhang</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#full-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Gindulyte+A&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Asta Gindulyte">Asta Gindulyte</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#full-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Bolton+EE&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Evan E Bolton">Evan E Bolton</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA. bolton@ncbi.nlm.nih.gov." href="#full-view-affiliation-2" ref="linksrc=author_aff"> 2 </a></sup></span> </div> </div> </div> <div class="short-article-details"> Affiliations <button class="more-details" id="toggle-authors" data-alt-text="Collapse" aria-controls="expanded-authors" aria-expanded="false" data-pinger-ignore data-fetch-url="/31399858/long-authors/" data-id-prefix=""> <span class="title"> Expand </span> </button> </div> <div class="extended-article-details" id="expanded-authors" aria-hidden="true"> <div class="expanded-authors" id="full-view-expanded-authors"> <div class="affiliations"> <h3 class="title"> Affiliations </h3> <ul class="item-list"> <li data-affiliation-id="full-view-affiliation-1" id="full-view-affiliation-1" ><sup class="key">1</sup> National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA.</li> <li data-affiliation-id="full-view-affiliation-2" id="full-view-affiliation-2" ><sup class="key">2</sup> National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA. bolton@ncbi.nlm.nih.gov.</li> </ul> </div> </div> </div> <ul class="identifiers" id="full-view-identifiers"> <li> <span class="identifier pubmed"> <span class="id-label"> PMID: </span> <strong class="current-id" title="PubMed ID">31399858</strong> </span> </li> <li> <span class="identifier pmc"> <span class="id-label"> PMCID: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=PMC6688265&id_type=PMC" href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6688265/" data-ga-category="full_text" data-ga-action="PMCID" > PMC6688265 </a> </span> </li> <li> <span class="identifier doi"> <span class="id-label"> DOI: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=10.1186/s13321-019-0375-2&id_type=DOI" href="https://doi.org/10.1186/s13321-019-0375-2" data-ga-category="full_text" data-ga-action="DOI" > 10.1186/s13321-019-0375-2 </a> </span> </li> </ul> <div class="in-clipboard-label " hidden> Item in Clipboard </div> </div> <div class="short-view" id="short-view-heading"> <h1 class="heading-title"> PUG-View: programmatic access to chemical annotations integrated in PubChem </h1> <div class="short-citation"> <span class="authors-list"> <span class="authors-list-item "><span class="full-name">Sunghwan Kim</span><span class="citation-separator"> et al.</span></span> </span> <span class="citation-journal"> J Cheminform<span class="citation-separator">.</span> </span> <span class="date"> <time class="citation-year" datetime="2019">2019</time><span class="citation-separator">.</span> </span> </div> <div class="more-article-details-section with-display-settings"> <button class="more-article-details" id="toggle-article-details" data-alt-text="Hide details" ref="linksrc=toggle_article_details" aria-controls="full-article-details" aria-expanded="false" data-fetch-url="/31399858/long-authors/" data-id-prefix=""> <span class="title">Show details</span> </button> <div class="display-options" data-format-key="format" data-default-format-value="abstract" data-current-format-value="abstract" role="region"> <button class="trigger usa-button" title="Change format" data-ga-category="display_options" 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in NLM Catalog </a></li><li><a class="add-to-search-link dropdown-block-link" ref ="linksrc=add_to_search_link" role="button" data-search-term='"J Cheminform"[jour]' data-ga-category="search" data-ga-action="add_to_search" data-ga-label='"J Cheminform"[jour]' href="#"> Add to Search </a></li></ul></div></div></div><span class="period">. </span><span class="cit">2019 Aug 9;11(1):56.</span> </div> <span class="citation-doi"> doi: 10.1186/s13321-019-0375-2. </span> </div> <div class="expanded-authors" id="short-view-expanded-authors"> <div class="authors"> <h3 class="title"> Authors </h3> <div class="authors-list"> <span class="authors-list-item "><a class="full-name" href="/?term=Kim+S&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Sunghwan Kim">Sunghwan Kim</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#short-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Thiessen+PA&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Paul A Thiessen">Paul A Thiessen</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#short-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Cheng+T&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Tiejun Cheng">Tiejun Cheng</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#short-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Zhang+J&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Jian Zhang">Jian Zhang</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#short-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Gindulyte+A&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Asta Gindulyte">Asta Gindulyte</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA." href="#short-view-affiliation-1" ref="linksrc=author_aff"> 1 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Bolton+EE&cauthor_id=31399858" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Evan E Bolton">Evan E Bolton</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA. bolton@ncbi.nlm.nih.gov." href="#short-view-affiliation-2" ref="linksrc=author_aff"> 2 </a></sup></span> </div> </div> <div class="affiliations"> <h3 class="title"> Affiliations </h3> <ul class="item-list"> <li data-affiliation-id="short-view-affiliation-1" id="short-view-affiliation-1" ><sup class="key">1</sup> National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA.</li> <li data-affiliation-id="short-view-affiliation-2" id="short-view-affiliation-2" ><sup class="key">2</sup> National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD, 20894, USA. bolton@ncbi.nlm.nih.gov.</li> </ul> </div> </div> <ul class="identifiers" id="short-view-identifiers"> <li> <span class="identifier pubmed"> <span class="id-label"> PMID: </span> <strong class="current-id" title="PubMed ID">31399858</strong> </span> </li> <li> <span class="identifier pmc"> <span class="id-label"> PMCID: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=PMC6688265&id_type=PMC" href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6688265/" data-ga-category="full_text" data-ga-action="PMCID" > PMC6688265 </a> </span> </li> <li> <span class="identifier doi"> <span class="id-label"> DOI: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=10.1186/s13321-019-0375-2&id_type=DOI" href="https://doi.org/10.1186/s13321-019-0375-2" data-ga-category="full_text" data-ga-action="DOI" > 10.1186/s13321-019-0375-2 </a> </span> </li> </ul> <div class="in-clipboard-label " hidden> Item in Clipboard </div> </div> </div> </header> <div class="actions-buttons inline"><div class="inner-wrap"><button class="full-text-links-button full-text-links-dialog-trigger" title="Open dialog with full text links" ref="linksrc=full_text_links"> Full text links </button><button class="citation-button citation-dialog-trigger" aria-label="Open dialog with citation text in different styles" data-ga-category="save_share" data-ga-action="cite" data-ga-label="open" data-all-citations-url="/31399858/citations/" data-citation-style="nlm" data-pubmed-format-link="/31399858/export/"><span class="button-label">Cite</span></button><button class="more-actions-button more-actions-dialog-trigger" title="Open dialog with more actions to take" ref="linksrc=more_actions_btn"></button><div class="display-options" data-format-key="format" data-default-format-value="abstract" data-current-format-value="abstract" role="region"><button class="trigger usa-button" title="Change format" data-ga-category="display_options" data-ga-action="display_options_dialog"><span class="button-label">Display options</span></button><div class="dropdown" hidden><div class="title"> Display options </div><div class="content"><div class="format-container"><span class="option-label"> Format </span><select name="format" data-initial-value="abstract" aria-label="Display format" id="inline-actions-display-format"><option value="abstract">Abstract</option><option value="pubmed">PubMed</option><option value="pmid">PMID</option></select></div></div></div></div></div></div> <div class="abstract" id="abstract"> <h2 class="title"> Abstract </h2> <div class="abstract-content selected" id="eng-abstract"> <p> PubChem is a chemical data repository that provides comprehensive information on various chemical entities. It contains a wealth of chemical information from hundreds of data sources. Programmatic access to this large amount of data provides researchers with new opportunities for data-intensive research. PubChem provides several programmatic access routes. One of these is PUG-View, which is a Representational State Transfer (REST)-style web service interface specialized for accessing annotation data contained in PubChem. The present paper describes various aspects of PUG-View, including the scope of data accessible through PUG-View, the syntax for formulating a PUG-View request URL, the difference of PUG-View from other web service interfaces in PubChem, and its limitations and usage policies. </p> </div> <p> <strong class="sub-title"> Keywords: </strong> PUG-REST; PUG-View; Programmatic access; PubChem; Web service. </p> </div> <p class="disclaimer" id="disclaimer"> <a href="/disclaimer/" target="_blank" ga_category="literature_resources" ga_action="disclaimer_link" ga_label="under_abstract">PubMed Disclaimer</a> </p> <div class="conflict-of-interest" id="conflict-of-interest"> <h2 class="title"> Conflict of interest statement </h2> <div class="statement"> <p xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:p1="http://pubmed.gov/pub-one">The authors declare that they have no competing interests.</p> </div> </div> <div class="figures" id="figures"> <h2 class="title"> Figures </h2> <div class="figures-list" id="slides-container" itemscope itemtype="http://schema.org/ImageGallery"> <figure class="figure-item " itemscope itemtype="http://schema.org/ImageObject" itemprop="associatedMedia" data-slide-index="0" data-label-slug="fig-1"> <a class="figure-link" href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/af1a15f5707d/13321_2019_375_Fig1_HTML.jpg" itemprop="contentUrl" aria-describedby="figure-caption-0" role="button" data-image-width="708" data-image-height="227" data-image-alt="Fig. 1" data-pmc-id="PMC6688265" data-figure-id="Fig1"> <img class="figure-thumb" itemprop="thumbnail" id="article-image-0" src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/bcb6fd5842fa/13321_2019_375_Fig1_HTML.gif" alt="Fig. 1" /> </a> <meta itemprop="width" itemtype="http://schema.org/ImageObject" content="708"> <meta itemprop="height" itemtype="http://schema.org/ImageObject" content="227"> <div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true"> <div class="caption-wrap"> <strong class="figure-label"> <p> Fig. 1 </p> </strong> <div class="figure-caption-contents"><p> URL construction of a typical… </p></div> </div> </div> <div class="figure-caption-medium figure-caption-text" aria-hidden="true"> <strong class="figure-label"> <p> Fig. 1 </p> </strong> <div class="figure-caption-contents"><p> URL construction of a typical PUG-View request. A typical PUG-View request URL encodes… </p></div> </div> <figcaption id="figure-caption-0" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description"> <strong class="figure-label"> Fig. 1 </strong> <div class="figure-caption-contents">URL construction of a typical PUG-View request. A typical PUG-View request URL encodes three pieces of information (the kind of annotation to retrieve, the record specification, and the desired output format) into one-line URL. Optional parameters specific to some requests may be added to the URL after the question mark (“?”). The available values for the <b>⟨</b>ANNOTATION<b>⟩</b> part are “data”, “index”, “annotations”, “categories”, “neighbors”, “literature”, “structure”, “image”, “qr”, and “linkout”</div> </figcaption> </figure> <figure class="figure-item " itemscope itemtype="http://schema.org/ImageObject" itemprop="associatedMedia" data-slide-index="1" data-label-slug="fig-2"> <a class="figure-link" href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/7db1a47ea1f9/13321_2019_375_Fig2_HTML.jpg" itemprop="contentUrl" aria-describedby="figure-caption-1" role="button" data-image-width="797" data-image-height="634" data-image-alt="Fig. 2" data-pmc-id="PMC6688265" data-figure-id="Fig2"> <img class="figure-thumb" itemprop="thumbnail" id="article-image-1" src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/3b9e32498438/13321_2019_375_Fig2_HTML.gif" alt="Fig. 2" /> </a> <meta itemprop="width" itemtype="http://schema.org/ImageObject" content="797"> <meta itemprop="height" itemtype="http://schema.org/ImageObject" content="634"> <div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true"> <div class="caption-wrap"> <strong class="figure-label"> <p> Fig. 2 </p> </strong> <div class="figure-caption-contents"><p> Retrieval of substances associated with… </p></div> </div> </div> <div class="figure-caption-medium figure-caption-text" aria-hidden="true"> <strong class="figure-label"> <p> Fig. 2 </p> </strong> <div class="figure-caption-contents"><p> Retrieval of substances associated with a given compound, grouped by source category. The… </p></div> </div> <figcaption id="figure-caption-1" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description"> <strong class="figure-label"> Fig. 2 </strong> <div class="figure-caption-contents">Retrieval of substances associated with a given compound, grouped by source category. The substance records associated with a given compound (CID 24 as an example), presented in the “Substance by Category” section of the Compound Summary page, can be downloaded through PUG-View</div> </figcaption> </figure> <figure class="figure-item " itemscope itemtype="http://schema.org/ImageObject" itemprop="associatedMedia" data-slide-index="2" data-label-slug="fig-3"> <a class="figure-link" href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/4d6832addbdf/13321_2019_375_Fig3_HTML.jpg" itemprop="contentUrl" aria-describedby="figure-caption-2" role="button" data-image-width="797" data-image-height="906" data-image-alt="Fig. 3" data-pmc-id="PMC6688265" data-figure-id="Fig3"> <img class="figure-thumb" itemprop="thumbnail" id="article-image-2" src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/5051bbbe902c/13321_2019_375_Fig3_HTML.gif" alt="Fig. 3" /> </a> <meta itemprop="width" itemtype="http://schema.org/ImageObject" content="797"> <meta itemprop="height" itemtype="http://schema.org/ImageObject" content="906"> <div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true"> <div class="caption-wrap"> <strong class="figure-label"> <p> Fig. 3 </p> </strong> <div class="figure-caption-contents"><p> Retrieval of biologic descriptions. To… </p></div> </div> </div> <div class="figure-caption-medium figure-caption-text" aria-hidden="true"> <strong class="figure-label"> <p> Fig. 3 </p> </strong> <div class="figure-caption-contents"><p> Retrieval of biologic descriptions. To get the biological depiction image of a biologic… </p></div> </div> <figcaption id="figure-caption-2" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description"> <strong class="figure-label"> Fig. 3 </strong> <div class="figure-caption-contents">Retrieval of biologic descriptions. To get the biological depiction image of a biologic compound (CID 91848714 as an example), the internal identifier (138308) to the biologic compound is retrieved and then used in a subsequent request for the image. The “…” in the figure above refers to the PubChem web address “<ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://pubchem.ncbi.nlm.nih.gov">http://pubchem.ncbi.nlm.nih.gov</ext-link>”, which is omitted</div> </figcaption> </figure> <figure class="figure-item " itemscope itemtype="http://schema.org/ImageObject" itemprop="associatedMedia" data-slide-index="3" data-label-slug="fig-4"> <a class="figure-link" href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/b58851c706f0/13321_2019_375_Fig4_HTML.jpg" itemprop="contentUrl" aria-describedby="figure-caption-3" role="button" data-image-width="784" data-image-height="700" data-image-alt="Fig. 4" data-pmc-id="PMC6688265" data-figure-id="Fig4"> <img class="figure-thumb" itemprop="thumbnail" id="article-image-3" src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/5c4d8c17c679/13321_2019_375_Fig4_HTML.gif" alt="Fig. 4" /> </a> <meta itemprop="width" itemtype="http://schema.org/ImageObject" content="784"> <meta itemprop="height" itemtype="http://schema.org/ImageObject" content="700"> <div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true"> <div class="caption-wrap"> <strong class="figure-label"> <p> Fig. 4 </p> </strong> <div class="figure-caption-contents"><p> Retrieval of annotation attachments. Some… </p></div> </div> </div> <div class="figure-caption-medium figure-caption-text" aria-hidden="true"> <strong class="figure-label"> <p> Fig. 4 </p> </strong> <div class="figure-caption-contents"><p> Retrieval of annotation attachments. Some annotations collected from authoritative sources are file attachments.… </p></div> </div> <figcaption id="figure-caption-3" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description"> <strong class="figure-label"> Fig. 4 </strong> <div class="figure-caption-contents">Retrieval of annotation attachments. Some annotations collected from authoritative sources are file attachments. Retrieving these attachments through PUG-View is a two-step process. In a first PUG-View request, the internal identifier for an attachment is obtained. This identifier is used in a second PUG-View request to retrieve the attachment. The “…” in the figure above refers to the PubChem web address “<ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://pubchem.ncbi.nlm.nih.gov">http://pubchem.ncbi.nlm.nih.gov</ext-link>”, which is omitted</div> </figcaption> </figure> <figure class="figure-item " itemscope itemtype="http://schema.org/ImageObject" itemprop="associatedMedia" data-slide-index="4" data-label-slug="fig-5"> <a class="figure-link" href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/f9348d37b1c5/13321_2019_375_Fig5_HTML.jpg" itemprop="contentUrl" aria-describedby="figure-caption-4" role="button" data-image-width="708" data-image-height="270" data-image-alt="Fig. 5" data-pmc-id="PMC6688265" data-figure-id="Fig5"> <img class="figure-thumb" itemprop="thumbnail" id="article-image-4" src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7454/6688265/f67ac1607474/13321_2019_375_Fig5_HTML.gif" alt="Fig. 5" /> </a> <meta itemprop="width" itemtype="http://schema.org/ImageObject" content="708"> <meta itemprop="height" itemtype="http://schema.org/ImageObject" content="270"> <div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true"> <div class="caption-wrap"> <strong class="figure-label"> <p> Fig. 5 </p> </strong> <div class="figure-caption-contents"><p> Multiple record identifiers in PUG-View… </p></div> </div> </div> <div class="figure-caption-medium figure-caption-text" aria-hidden="true"> <strong class="figure-label"> <p> Fig. 5 </p> </strong> <div class="figure-caption-contents"><p> Multiple record identifiers in PUG-View and PUG-REST. While only a single record identifier… </p></div> </div> <figcaption id="figure-caption-4" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description"> <strong class="figure-label"> Fig. 5 </strong> <div class="figure-caption-contents">Multiple record identifiers in PUG-View and PUG-REST. While only a single record identifier is supported in the PUG-View request URL, PUG-REST can accept multiple record identifiers. The “…” in the figure above refers to the PubChem web address “<ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://pubchem.ncbi.nlm.nih.gov">http://pubchem.ncbi.nlm.nih.gov</ext-link>”, which is omitted</div> </figcaption> </figure> </div>  <div class="pswp figures-dialog" id="figures-dialog" tabindex="-1" role="dialog" aria-hidden="true" data-image-gallery-uid="article-figures" aria-label="Figures Dialog">  <div class="pswp__bg"></div>  <div class="pswp__scroll-wrap">  <div class="pswp__container"> <div class="pswp__item"></div> <div class="pswp__item"></div> <div class="pswp__item"></div> </div>  <div class="pswp__ui pswp__ui--hidden"> <div class="pswp__top-bar">  <div class="pswp__counter"></div> <button class="pswp__button pswp__button--close" title="Close (Esc)"></button> <button class="pswp__button pswp__button--share" title="Share"></button> <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button> <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>   <div class="pswp__preloader"> <div class="pswp__preloader__icn"> <div class="pswp__preloader__cut"> <div class="pswp__preloader__donut"></div> </div> </div> </div> </div> <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap"> <div class="pswp__share-tooltip"></div> </div> <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)"> </button> <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)"> </button> <div class="pswp__caption"> <div class="pswp__caption__center"></div> </div> </div> </div> </div> <div class="figure-dialog-caption"> <div class="figure-caption-link-container"> <a class="figure-caption-link" href="#">See this image and copyright information in PMC</a> </div> <div class="figure-caption-center" data-expand-title="click to show full caption" data-collapse-title="click to hide full caption"> </div> <button class="figure-caption-toggle-btn" aria-label="show full caption" data-expand-text="show full caption" data-collapse-text="hide full caption">  </button> </div> </div> <div class="similar-articles" id="similar"> <h2 class="title"> Similar articles </h2> <ul class="articles-list" id="similar-articles-list"> <li class="full-docsum"> <div class="docsum-content" style="display:inline;"> <a class="docsum-title" href="/25934803/" ref="article_id=25934803&linksrc=similar_articles_link&ordinalpos=1" data-ga-category="similar_article" data-ga-action="25934803" data-ga-label=""> PUG-SOAP and PUG-REST: web services for programmatic access to chemical information in PubChem. </a> <div class="docsum-citation full-citation"> <span class="docsum-authors full-authors">Kim S, Thiessen PA, Bolton EE, Bryant SH.</span> <span class="docsum-authors short-authors">Kim S, et al.</span> <span class="docsum-journal-citation full-journal-citation">Nucleic Acids Res. 2015 Jul 1;43(W1):W605-11. doi: 10.1093/nar/gkv396. 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Nucleic Acids Res. 2015;43:W605–W611. doi: 10.1093/nar/gkv396. - <a class="reference-link" href="https://doi.org/10.1093/nar/gkv396" ref="linksrc=references_link&ordinalpos=1" data-ga-category="reference" data-ga-action="10.1093/nar/gkv396" > DOI </a> - <a class="reference-link" href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4489244/" ref="linksrc=references_link&ordinalpos=2" data-ga-category="reference" data-ga-action="PMC4489244" > PMC </a> - <a class="reference-link" href="/25934803/" ref="linksrc=references_link&ordinalpos=3" data-ga-category="reference" data-ga-action="25934803" > PubMed </a> </li> </ol> </li> <li> <ol class="references-and-notes-list"> <li class="skip-numbering" value="1"> Entrez programming utilities help. <a href="https://www.ncbi.nlm.nih.gov/books/NBK25501/" rel="noopener nofollow" target="_blank" title="External link: https://www.ncbi.nlm.nih.gov/books/NBK25501/">https://www.ncbi.nlm.nih.gov/books/NBK25501/</a>. 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