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Chemical Structure Representation Toolkit
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row-number-1 "> <div class="row-fluid "> <div class="span12 widget-span widget-type-cell dnd-column" style="" data-widget-type="cell" data-x="0" data-w="12"> <div class="row-fluid-wrapper row-depth-1 row-number-2 "> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_widget_1661133458856" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="VerticalHero border"> <div class="grid grid-padding"> <div class="VerticalHero__content"> <div class="VerticalHero__image"> <img style=" max-height:320px; max-width:992px " src="https://chemaxon.com/hs-fs/hubfs/Hero%20images/Search_Chemical-Structure-Representation-Toolkit.jpg?width=2732&height=1537&name=Search_Chemical-Structure-Representation-Toolkit.jpg" alt="Search_Chemical-Structure-Representation-Toolkit" width="2732" height="1537" rel="preload" as="image" srcset="https://chemaxon.com/hs-fs/hubfs/Hero%20images/Search_Chemical-Structure-Representation-Toolkit.jpg?width=1366&height=769&name=Search_Chemical-Structure-Representation-Toolkit.jpg 1366w, https://chemaxon.com/hs-fs/hubfs/Hero%20images/Search_Chemical-Structure-Representation-Toolkit.jpg?width=2732&height=1537&name=Search_Chemical-Structure-Representation-Toolkit.jpg 2732w, https://chemaxon.com/hs-fs/hubfs/Hero%20images/Search_Chemical-Structure-Representation-Toolkit.jpg?width=4098&height=2306&name=Search_Chemical-Structure-Representation-Toolkit.jpg 4098w, https://chemaxon.com/hs-fs/hubfs/Hero%20images/Search_Chemical-Structure-Representation-Toolkit.jpg?width=5464&height=3074&name=Search_Chemical-Structure-Representation-Toolkit.jpg 5464w, https://chemaxon.com/hs-fs/hubfs/Hero%20images/Search_Chemical-Structure-Representation-Toolkit.jpg?width=6830&height=3843&name=Search_Chemical-Structure-Representation-Toolkit.jpg 6830w, https://chemaxon.com/hs-fs/hubfs/Hero%20images/Search_Chemical-Structure-Representation-Toolkit.jpg?width=8196&height=4611&name=Search_Chemical-Structure-Representation-Toolkit.jpg 8196w" sizes="(max-width: 2732px) 100vw, 2732px"> </div> <div class="VerticalHero__text" style="max-width:904px"> <div class="flow xl-heading"><h1>Chemical Structure Representation Toolkit</h1> <h2>Canonicalization and correction of chemical structures</h2></div> </div> </div> </div> </div></div> </div><!--end widget-span --> </div><!--end row--> </div><!--end row-wrapper --> <div class="row-fluid-wrapper row-depth-1 row-number-3 "> <div class="row-fluid "> <div class="span3 widget-span widget-type-cell dnd-column" style="" data-widget-type="cell" data-x="0" data-w="3"> <div class="row-fluid-wrapper row-depth-1 row-number-4 "> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_widget_1661133530490" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="TwoColumnBanner "> <div class="grid grid--cols-2 grid--align-end"> <div class="TwoColumnBanner__text grid-padding"> <p class="supertitle">Summary</p> <div class="flow "><h2>Adding new compounds to an existing chemical database always raises the issue of uniqueness and correctness.</h2> <p>When registering a new item, migrating legacy data or uploading a set of compounds to a database; the new entries have to fulfill certain requirements. Chemical structures can be represented in many different ways. These differences affect not only the graphic appearance of the molecules, but can influence more fundamental details of the topology, making compound identification even more problematic. Obviously structural mistakes and errors have to be addressed too.</p> <p>Chemaxon's chemical structure representation toolkit has two major components: Standardizer, transforming chemical structures into customized, canonical representations; and Structure Checker, offering numerous checkers and fixers to search and correct various structural issues.</p></div> </div> <div class=" TwoColumnBanner__media TwoColumnBanner__media--contain" style="background-color: rgba(255, 255, 255, 1);"> <img class="TwoColumnBanner__image" src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2014.png?width=1893&height=1537&name=Spot%20Image%2014.png" alt="Spot Image 14" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2014.png?width=947&height=769&name=Spot%20Image%2014.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2014.png?width=1893&height=1537&name=Spot%20Image%2014.png 1893w, 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data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="CTAGridRow border "> <div class="grid grid--cols-2"> <div class="CTAGridRow__item grid-padding CTAGridRow__item--gold"> <div class="CTAGridRow__content"> <div class="CTAGridRow__image"> <img src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Book%20a%20demo.png?width=1893&height=1537&name=Book%20a%20demo.png" alt="Book a demo" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Book%20a%20demo.png?width=947&height=769&name=Book%20a%20demo.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Book%20a%20demo.png?width=1893&height=1537&name=Book%20a%20demo.png 1893w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Book%20a%20demo.png?width=2840&height=2306&name=Book%20a%20demo.png 2840w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Book%20a%20demo.png?width=3786&height=3074&name=Book%20a%20demo.png 3786w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Book%20a%20demo.png?width=4733&height=3843&name=Book%20a%20demo.png 4733w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Book%20a%20demo.png?width=5679&height=4611&name=Book%20a%20demo.png 5679w" sizes="(max-width: 1893px) 100vw, 1893px"> </div> <div class="CTAGridRow__text"> <div class="flow"><h2>Meet with Us</h2></div> <div class="ButtonRow ButtonRow--centre"> <div class="Button Button--black Button--icon Button--outlined "> <a href="https://chemaxon.com/form-submit?hsLang=en"> Book a Demo </a> </div> </div> </div> </div> </div> <div class="CTAGridRow__item grid-padding CTAGridRow__item--black"> <div class="CTAGridRow__content"> <div class="CTAGridRow__image"> <img src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Download.png?width=1893&height=1537&name=Download.png" alt="Download" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Download.png?width=947&height=769&name=Download.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Download.png?width=1893&height=1537&name=Download.png 1893w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Download.png?width=2840&height=2306&name=Download.png 2840w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Download.png?width=3786&height=3074&name=Download.png 3786w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Download.png?width=4733&height=3843&name=Download.png 4733w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Download.png?width=5679&height=4611&name=Download.png 5679w" sizes="(max-width: 1893px) 100vw, 1893px"> </div> <div class="CTAGridRow__text"> <div class="flow"><h2>Download</h2></div> <div class="ButtonRow ButtonRow--centre"> <div class="Button Button--black Button--icon Button--outlined "> <a href="https://download.chemaxon.com/chemical-structure-representation-toolkit" target="_blank" rel="noopener"> Download Chemical Structure Representation Toolkit </a> </div> </div> </div> </div> </div> </div> </div></div> </div><!--end widget-span --> </div><!--end row--> </div><!--end row-wrapper --> </div><!--end widget-span --> <div class="span3 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="3" data-w="3"> <div id="hs_cos_wrapper_module_1662111421476" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="TwoColumnBanner TwoColumnBanner--flip"> <div class="grid grid--cols-2 grid--align-end"> <div class="TwoColumnBanner__text grid-padding"> <p class="supertitle">Features</p> <div class="flow "><h2>Standardizer - canonicalizing chemical structures</h2> <p>Standardizer's main purpose is to transform chemical structures into representations that obey certain chemical business rules to avoid inconsistencies in a chemical database. The tool is typically used in workflows where new compounds are registered, or where structure-based virtual screening is performed. There are 40 pre-defined standardizer actions available that cover among others the following issues:</p> <ul> <li>Adding or removing explicit Hydrogen atoms</li> <li>Neutralizing charged fragments or functional groups</li> <li>Recognizing and converting legacy representations of functional groups (like aliases)</li> <li>Removing certain fragments (like water and salt counterions)</li> <li>2D cleaning and expanding abbreviated groups</li> <li>Unified representation of aromatic rings, tautomers and mesomers</li> </ul> <p><a href="https://docs.chemaxon.com/display/docs/standardizer-actions.md">Read about more Standardizer's actions</a>. Besides the pre-defined rules, you can also implement your own ones as well.</p></div> </div> <div class="expandable TwoColumnBanner__media TwoColumnBanner__media--contain" style="background-color: rgba(255, 255, 255, 1);"> <img class="TwoColumnBanner__image" src="https://chemaxon.com/hs-fs/hubfs/nitrobenzene_representations_standardizer.png?width=716&height=868&name=nitrobenzene_representations_standardizer.png" alt="nitrobenzene_representations_standardizer" width="716" height="868" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/nitrobenzene_representations_standardizer.png?width=358&height=434&name=nitrobenzene_representations_standardizer.png 358w, https://chemaxon.com/hs-fs/hubfs/nitrobenzene_representations_standardizer.png?width=716&height=868&name=nitrobenzene_representations_standardizer.png 716w, https://chemaxon.com/hs-fs/hubfs/nitrobenzene_representations_standardizer.png?width=1074&height=1302&name=nitrobenzene_representations_standardizer.png 1074w, https://chemaxon.com/hs-fs/hubfs/nitrobenzene_representations_standardizer.png?width=1432&height=1736&name=nitrobenzene_representations_standardizer.png 1432w, https://chemaxon.com/hs-fs/hubfs/nitrobenzene_representations_standardizer.png?width=1790&height=2170&name=nitrobenzene_representations_standardizer.png 1790w, https://chemaxon.com/hs-fs/hubfs/nitrobenzene_representations_standardizer.png?width=2148&height=2604&name=nitrobenzene_representations_standardizer.png 2148w" sizes="(max-width: 716px) 100vw, 716px"> </div> </div> </div></div> </div><!--end widget-span --> <div class="span3 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="6" data-w="3"> <div id="hs_cos_wrapper_module_1662111744027" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="TwoColumnBanner "> <div class="grid grid--cols-2 grid--align-end"> <div class="TwoColumnBanner__text grid-padding"> <p class="supertitle">Features</p> <div class="flow "><div> <h2>Structure Checker - correcting errors in chemical structures</h2> <p>Structure Checker searches molecules for structural problems. In case it finds an issue, the error in a structure is highlighted, and an instant solution is prompted. The reported problem can be fixed automatically by a built-in, prompted fixer or manually by the user. This tool is crucial in filtering out drawing errors and incorrect features when a new compound is registered. More than 40 checkers add up the system, correcting issues like:</p> <p> </p> <ul> <li>Invalid bond length</li> <li>Overlapping bonds or atoms</li> <li>Molecule charges</li> <li>Incorrect chiral flags</li> <li>Invalid valences</li> <li>OCR errors</li> <li>Substructure checker that can be configured to transform a given substructure defined by a SMARTS string</li> </ul> <p><a href="https://docs.chemaxon.com/display/docs/checker-list.md">Read about more checkers</a>. Structure Checker is highly customizable, so adding your own checker is also possible.</p> </div> <div> </div> <br></div> </div> <div class="expandable TwoColumnBanner__media TwoColumnBanner__media--contain" style="background-color: rgba(255, 255, 255, 1);"> <img class="TwoColumnBanner__image" src="https://chemaxon.com/hs-fs/hubfs/structure_checker_workflow.png?width=946&height=494&name=structure_checker_workflow.png" alt="structure_checker_workflow" width="946" height="494" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/structure_checker_workflow.png?width=473&height=247&name=structure_checker_workflow.png 473w, https://chemaxon.com/hs-fs/hubfs/structure_checker_workflow.png?width=946&height=494&name=structure_checker_workflow.png 946w, https://chemaxon.com/hs-fs/hubfs/structure_checker_workflow.png?width=1419&height=741&name=structure_checker_workflow.png 1419w, https://chemaxon.com/hs-fs/hubfs/structure_checker_workflow.png?width=1892&height=988&name=structure_checker_workflow.png 1892w, https://chemaxon.com/hs-fs/hubfs/structure_checker_workflow.png?width=2365&height=1235&name=structure_checker_workflow.png 2365w, https://chemaxon.com/hs-fs/hubfs/structure_checker_workflow.png?width=2838&height=1482&name=structure_checker_workflow.png 2838w" sizes="(max-width: 946px) 100vw, 946px"> </div> </div> </div></div> </div><!--end widget-span --> <div class="span3 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="9" data-w="3"> <div id="hs_cos_wrapper_module_1662111990703" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="TwoColumnBanner TwoColumnBanner--flip"> <div class="grid grid--cols-2 grid--align-end"> <div class="TwoColumnBanner__text grid-padding"> <p class="supertitle">Benefits</p> <div class="flow "><h3>Customizability</h3> <p>Toolkit components can be easily tailored to unique business needs and regulations. Both Standardizer and Structure Checker have a full featured Application Programming Interface (API) in Java and in .NET, making this solution easily integratable with in-house or third-party applications. (Reach out for Standardizer<span> </span><a href="https://apidocs.chemaxon.com/jchem/doc/dev/java/api/index.html?chemaxon/reaction/Standardizer.html">Java API</a>,<span> </span><a href="https://apidocs.chemaxon.com/dotNET/6.3/API/online/index.html">.NET API</a>; or for Structure Checker<span> </span><a href="https://apidocs.chemaxon.com/jchem/doc/dev/java/api/chemaxon/checkers/StructureChecker.html">Java API</a>,<span> </span><a href="https://apidocs.chemaxon.com/dotNET/6.3/API/online/index.html">.NET API</a>). Meaning that, with some programming you are able to add your own standardizer actions, checkers, and fixers to your own system. These custom solutions are required usually if specific atoms, functional groups or patterns in the structures need to be removed or replaced with Standardizer; and if you have to handle chemical features that cannot be handled by the built-in checkers and fixers in Structure Checker.</p> <p>Read more about<span> </span><a href="https://docs.chemaxon.com/display/docs/custom-standardizer-actions.md">custom standardizer actions</a><span> </span>and<span> </span><a href="https://docs.chemaxon.com/display/docs/standardizer-developer-s-guide.md#StandardizerDeveloper'sGuide-ImplementingcustomStandardizeractions">implementing them</a>; and about<span> </span><a href="https://docs.chemaxon.com/display/docs/implementing-fixers.md">implementing fixers</a>.</p></div> </div> <div class="expandable TwoColumnBanner__media TwoColumnBanner__media--contain" style="background-color: rgba(255, 255, 255, 1);"> <img class="TwoColumnBanner__image" src="https://chemaxon.com/hs-fs/hubfs/custom-fixer-implementation-with-structure-checker-api.png?width=857&height=721&name=custom-fixer-implementation-with-structure-checker-api.png" alt="custom-fixer-implementation-with-structure-checker-api" width="857" height="721" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/custom-fixer-implementation-with-structure-checker-api.png?width=429&height=361&name=custom-fixer-implementation-with-structure-checker-api.png 429w, https://chemaxon.com/hs-fs/hubfs/custom-fixer-implementation-with-structure-checker-api.png?width=857&height=721&name=custom-fixer-implementation-with-structure-checker-api.png 857w, https://chemaxon.com/hs-fs/hubfs/custom-fixer-implementation-with-structure-checker-api.png?width=1286&height=1082&name=custom-fixer-implementation-with-structure-checker-api.png 1286w, https://chemaxon.com/hs-fs/hubfs/custom-fixer-implementation-with-structure-checker-api.png?width=1714&height=1442&name=custom-fixer-implementation-with-structure-checker-api.png 1714w, https://chemaxon.com/hs-fs/hubfs/custom-fixer-implementation-with-structure-checker-api.png?width=2143&height=1803&name=custom-fixer-implementation-with-structure-checker-api.png 2143w, https://chemaxon.com/hs-fs/hubfs/custom-fixer-implementation-with-structure-checker-api.png?width=2571&height=2163&name=custom-fixer-implementation-with-structure-checker-api.png 2571w" sizes="(max-width: 857px) 100vw, 857px"> </div> </div> </div></div> </div><!--end widget-span --> </div><!--end row--> </div><!--end row-wrapper --> <div class="row-fluid-wrapper row-depth-1 row-number-6 "> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_module_1662117785325" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="TwoColumnBanner "> <div class="grid grid--cols-2 grid--align-end"> <div class="TwoColumnBanner__text grid-padding"> <p class="supertitle">Benefits</p> <div class="flow "><h2>Accessibility</h2> <p>The Chemical Structure Representation Toolkit has individual applications for both<span> </span><a href="https://docs.chemaxon.com/display/docs/standardizer-application.md">Standardizer</a><span> </span>and<span> </span><a href="https://docs.chemaxon.com/display/docs/structure-checker-application.md">Structure Checker</a>. However, thanks to their extensive APIs, these tools are most often paired with other Chemaxon software:</p> <ul> <li>Both components play a key role in registration and chemical structure search, so no wonder that<span> </span><a href="/compound-registration?hsLang=en">Compound Registration</a><span> </span>and the<span> </span><a href="/jchem-engines?hsLang=en">JChem Engines</a><span> </span>include the mentioned functionalities.</li> <li>Chemical database management relies on the represetation toolkit on desktop (<a href="/instant-jchem?hsLang=en">Instant JChem</a>,<span> </span><a href="/jchem-for-office?hsLang=en">JChem for Office</a>) and online (Plexus Suit<a href="https://docs.chemaxon.com/display/docs/plexus-suite.md">e</a>).</li> <li> <a href="/design-hub?hsLang=en">Marvin Live</a><span> </span>and<span> </span><a href="https://chemicalize.com/welcome">Chemicalize</a><span> </span>use the toolkit's capabilities too.</li> <li>Structure checking is an important feature within our<span> </span><a href="/marvin?hsLang=en">Marvin</a><span> </span>chemical drawing tool.</li> <li>Both functionality can be found in workflow tools - like<span> </span>KNIME<span> </span>and<span> </span>Pipeline Pilot</li> <li>The toolkit is also available from command line (<a href="https://docs.chemaxon.com/display/docs/standardizer-command-line-application.md">Standardizer CL</a><span> </span>and<span> </span><a href="https://docs.chemaxon.com/display/docs/structure-checker-command-line-application.md">Structure Checker CL</a>).</li> </ul></div> </div> <div class=" TwoColumnBanner__media TwoColumnBanner__media--contain" style="background-color: rgba(255, 255, 255, 1);"> <img class="TwoColumnBanner__image" src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2013.png?width=1893&height=1537&name=Spot%20Image%2013.png" alt="Spot Image 13" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2013.png?width=947&height=769&name=Spot%20Image%2013.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2013.png?width=1893&height=1537&name=Spot%20Image%2013.png 1893w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2013.png?width=2840&height=2306&name=Spot%20Image%2013.png 2840w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2013.png?width=3786&height=3074&name=Spot%20Image%2013.png 3786w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2013.png?width=4733&height=3843&name=Spot%20Image%2013.png 4733w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Spot%20Image%2013.png?width=5679&height=4611&name=Spot%20Image%2013.png 5679w" sizes="(max-width: 1893px) 100vw, 1893px"> </div> </div> </div></div> </div><!--end widget-span --> </div><!--end row--> </div><!--end row-wrapper --> <div class="row-fluid-wrapper row-depth-1 row-number-7 "> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_widget_1662464826823" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="SectionTitle border "> <div class="SectionTitle--left grid grid-padding "> <div class="SectionTitle__content" style="max-width:680px"> <p class="supertitle">Knowledge Hub</p> <div class="flow xl-heading"><h2>Resources</h2> <p>Learn more about Structure Representation</p></div> </div> </div> </div></div> </div><!--end widget-span --> </div><!--end row--> </div><!--end row-wrapper --> <div class="row-fluid-wrapper row-depth-1 row-number-8 "> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_widget_1661133878842" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="ListCards border"> <div class="grid grid--cols-4"> <div class="ListCard"> <div class="ListCard__text"> <div class="flow"> <h3>Documentation</h3> </div> </div> <div class="ListCard__image aspect--16-10"> <img class="image--contain" src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Documents.png?width=1893&height=1537&name=Documents.png" alt="Documents" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Documents.png?width=947&height=769&name=Documents.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Documents.png?width=1893&height=1537&name=Documents.png 1893w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Documents.png?width=2840&height=2306&name=Documents.png 2840w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Documents.png?width=3786&height=3074&name=Documents.png 3786w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Documents.png?width=4733&height=3843&name=Documents.png 4733w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Documents.png?width=5679&height=4611&name=Documents.png 5679w" sizes="(max-width: 1893px) 100vw, 1893px"> </div> <div class="ListCard--bottom"> <div class="ListCardItems"> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/standardizer-user-s-guide.md" target="_blank" rel="noopener"> <p><strong>Standardizer User's Guide</strong></p> </a> </div> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/structure-checker-user-s-guide.md" target="_blank" rel="noopener"> <p><strong>Structure Checker User's Guide</strong></p> </a> </div> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/standardizer-developer-s-guide.md" target="_blank" rel="noopener"> <p><strong>Standardizer Developer's Guide</strong></p> </a> </div> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/structure-checker-developer-s-guide.md"> Structure Checker Developer's Guide </a> </div> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/standardizer-installation-and-system-requirements.md"> Standardizer Installation Guide </a> </div> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/structure-checker-installation-and-system-requirements.md"> Structure Checker Installation Guide </a> </div> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/standardizer-configuration.md"> Standardizer Configuration Guide </a> </div> <div class="ListCardItem"> <a href="https://docs.chemaxon.com/display/docs/checker-list.md"> List of Available Checkers </a> </div> </div> </div> </div> <div class="ListCard"> <div class="ListCard__text"> <div class="flow"> <h3>API Docs</h3> </div> </div> <div class="ListCard__image aspect--16-10"> <img class="image--contain" src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Licensing.png?width=1893&height=1537&name=Licensing.png" alt="Licensing" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Licensing.png?width=947&height=769&name=Licensing.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Licensing.png?width=1893&height=1537&name=Licensing.png 1893w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Licensing.png?width=2840&height=2306&name=Licensing.png 2840w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Licensing.png?width=3786&height=3074&name=Licensing.png 3786w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Licensing.png?width=4733&height=3843&name=Licensing.png 4733w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Licensing.png?width=5679&height=4611&name=Licensing.png 5679w" sizes="(max-width: 1893px) 100vw, 1893px"> </div> <div class="ListCard--bottom"> <div class="ListCardItems"> <div class="ListCardItem"> <a href="https://apidocs.chemaxon.com/jchem/doc/dev/java/api/index.html?chemaxon/reaction/Standardizer.html" target="_blank" rel="noopener"> <p><strong>Standardizer Java API</strong></p> </a> </div> <div class="ListCardItem"> <a href="https://apidocs.chemaxon.com/jchem/doc/dev/java/api/chemaxon/checkers/StructureChecker.html" target="_blank" rel="noopener"> <p><strong>Structure Checker Java API</strong></p> </a> </div> <div class="ListCardItem"> <a href="https://apidocs.chemaxon.com/dotNET/6.3/API/online/index.html"> .NET API </a> </div> </div> </div> </div> <div class="ListCard"> <div class="ListCard__text"> <div class="flow"> <h3>Training & Examples</h3> </div> </div> <div class="ListCard__image aspect--16-10"> <img class="image--contain" src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Training.png?width=1893&height=1537&name=Training.png" alt="Training" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Training.png?width=947&height=769&name=Training.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Training.png?width=1893&height=1537&name=Training.png 1893w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Training.png?width=2840&height=2306&name=Training.png 2840w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Training.png?width=3786&height=3074&name=Training.png 3786w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Training.png?width=4733&height=3843&name=Training.png 4733w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Training.png?width=5679&height=4611&name=Training.png 5679w" sizes="(max-width: 1893px) 100vw, 1893px"> </div> <div class="ListCard--bottom"> <div class="ListCardItems"> <div class="ListCardItem"> <a href="https://chemaxon.com/products/chemical-structure-representation-toolkit/download?hsLang=en" target="_blank" rel="noopener"> <p><strong>Standardizer Configuration</strong></p> </a> </div> <div class="ListCardItem"> <a href="https://chemaxon.com/search?q=Standardizer+%22Structure+Checker%22&hsLang=en" target="_blank" rel="noopener"> <p><strong>Library items</strong></p> </a> </div> </div> </div> </div> <div class="ListCard"> <div class="ListCard__text"> <div class="flow"> <h3>Help & support</h3> </div> </div> <div class="ListCard__image aspect--16-10"> <img class="image--contain" src="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Help%20and%20support.png?width=1893&height=1537&name=Help%20and%20support.png" alt="Help and support" width="1893" height="1537" loading="lazy" srcset="https://chemaxon.com/hs-fs/hubfs/Spot%20images/Help%20and%20support.png?width=947&height=769&name=Help%20and%20support.png 947w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Help%20and%20support.png?width=1893&height=1537&name=Help%20and%20support.png 1893w, https://chemaxon.com/hs-fs/hubfs/Spot%20images/Help%20and%20support.png?width=2840&height=2306&name=Help%20and%20support.png 2840w, 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