<span class="separated-list-container"><span class="separated-list col-lg-12 col-xl-6"><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds that contain a pyrimidine ring, which bears a ketone. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions." href="http://classyfire.wishartlab.com/tax_nodes/C0000291" rel="noopener" target="_blank">Pyrimidones</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Organic compounds containing an amino group attached to a pyrimidine ring. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions." href="http://classyfire.wishartlab.com/tax_nodes/C0001262" rel="noopener" target="_blank">Aminopyrimidines and derivatives</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Aromatic compounds containing a halogen atom linked to a pyrimidine ring. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions." href="http://classyfire.wishartlab.com/tax_nodes/C0001893" rel="noopener" target="_blank">Halopyrimidines</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Organic compounds containing the acyl fluoride functional group." href="http://classyfire.wishartlab.com/tax_nodes/C0001031" rel="noopener" target="_blank">Aryl fluorides</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds containing a hydrogenated pyrimidine ring (i.e. containing less than the maximum number of double bonds.)." href="http://classyfire.wishartlab.com/tax_nodes/C0002202" rel="noopener" target="_blank">Hydropyrimidines</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Cyclic organooxygen compounds containing the structure RC(=N)N where the central carbon atom and one of the linked nitrogen atoms are part of the same ring( R here is an organyl group). They can also be viewed as analogs of lactams where the oxygen atom is replaced by a nitrogen atom." href="http://classyfire.wishartlab.com/tax_nodes/C0003886" rel="noopener" target="_blank">Imidolactams</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds containing an oxathiolane moiety, which consists of a saturated aliphatic five-member ring with one oxygen atom, a sulfur atom, and three carbon atoms. Isomers  of oxaphospholane include meta-oxathiolane, and ortho-oxathiolane." href="http://classyfire.wishartlab.com/tax_nodes/C0000106" rel="noopener" target="_blank">Oxathiolanes</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds containing an aromatic ring where a carbon atom is linked to an hetero atom." href="http://classyfire.wishartlab.com/tax_nodes/C0004144" rel="noopener" target="_blank">Heteroaromatic compounds</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds containing a monothioacetal functional group with the general structure R2C(OR')(SR')." href="http://classyfire.wishartlab.com/tax_nodes/C0002131" rel="noopener" target="_blank">Monothioacetals</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Organic compounds containing an heterocycle with at least one oxygen atom linked to a ring carbon." href="http://classyfire.wishartlab.com/tax_nodes/C0004140" rel="noopener" target="_blank">Oxacyclic compounds</a></span></span></span><span class="hidden-taxonomy" style="display: none"><span class="list-separator"> / </span><span class="separated-list-container"><span class="separated-list col-lg-12 col-xl-6"><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Organic compounds containing an heterocycle with at least one nitrogen atom and one carbon atom linked to each other." href="http://classyfire.wishartlab.com/tax_nodes/C0004139" rel="noopener" target="_blank">Azacyclic compounds</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds containing a bond between carbon a pnictogen atom. Pnictogens are p-block element atoms that are in the group 15 of the periodic table." href="http://classyfire.wishartlab.com/tax_nodes/C0004557" rel="noopener" target="_blank">Organopnictogen compounds</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Derivatives of hydrocarbons obtained by substituting one or more carbon atoms by an heteroatom. They contain at least one carbon atom and heteroatom." href="http://classyfire.wishartlab.com/tax_nodes/C0004150" rel="noopener" target="_blank">Hydrocarbon derivatives</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds comprising the primary alcohol functional group, with the general structure RCOH (R=alkyl, aryl)." href="http://classyfire.wishartlab.com/tax_nodes/C0000286" rel="noopener" target="_blank">Primary alcohols</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Amines having the nitrogen atom linked to exactly one hydrocarbyl group." href="http://classyfire.wishartlab.com/tax_nodes/C0002450" rel="noopener" target="_blank">Primary amines</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Organic compounds containing an oxide group." href="http://classyfire.wishartlab.com/tax_nodes/C0003940" rel="noopener" target="_blank">Organic oxides</a></span><span class="list-separator"> / </span><span class="separated-list-item"><a class="classyfire-taxnode" data-content="Compounds containing a chemical bond between a carbon atom and a fluorine atom." href="http://classyfire.wishartlab.com/tax_nodes/C0001517" rel="noopener" target="_blank">Organofluorides</a></span></span></span></span><a class="taxonomy-toggler" href="javascript:void();"><div class="drugbank-icon icon-expand"><svg class="icon" role="img" title="expand">
<use xlink:href="/assets/icons-539be351b538129271b9ee92cb0ebbd16efad4fccf6e2fe95aa6234f1e7417fa.svg#expand"></use>
</svg>
</div> show 7 more</a>