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    <!-- http://purl.obolibrary.org/obo/CHEBI_15940 -->

    <Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_15940">
        <rdfs:label>nicotinic acid</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/CHEBI_176839"/>
        <ns4:charge rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">0</ns4:charge>
        <ns4:monoisotopic_mass rdf:datatype="http://www.w3.org/2001/XMLSchema#decimal">123.03203</ns4:monoisotopic_mass>
        <ns4:mass rdf:datatype="http://www.w3.org/2001/XMLSchema#decimal">123.111</ns4:mass>
        <oboInOwl:hasDbXref>kegg.compound:C00253</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:16400392</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>nicotinic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:19779335</oboInOwl:hasDbXref>
        <oboInOwl:id>CHEBI:15940</oboInOwl:id>
        <oboInOwl:hasDbXref>agr:IND607088605</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>hmdb:HMDB0001488</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>acide nicotinique</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:7217784</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:135660</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:8679452</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:21632263</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:15651982</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:19678716</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:10540864</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>vitamin B3</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:25040591</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>NICOTINIC ACID</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>reaxys:109591</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:15183629</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:18996527</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:24975217</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:34085526</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>pyridine-3-carboxylic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>Niacin</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:33273654</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:25241762</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:25429652</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>3-carboxylpyridine</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:16018787</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:18037924</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:7581845</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:24675661</oboInOwl:hasDbXref>
        <oboInOwl:hasExactSynonym>NICOTINIC ACID</oboInOwl:hasExactSynonym>
        <oboInOwl:hasRelatedSynonym>3-Pyridylcarboxylic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:22229411</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:186078</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>gmelin:3340</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:19369827</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>3-pyridinecarboxylic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:22116693</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:12789870</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>Nicotinsaure</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:24029555</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>lincs.smallmolecule:LSM-4676</oboInOwl:hasDbXref>
        <ns4:inchi_key_string>PVNIIMVLHYAWGP-UHFFFAOYSA-N</ns4:inchi_key_string>
        <oboInOwl:hasDbXref>pubmed:22366213</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>metacyc.compound:NIACINE</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:16172771</oboInOwl:hasDbXref>
        <oboInOwl:hasAlternativeId>CHEBI:7559</oboInOwl:hasAlternativeId>
        <oboInOwl:hasDbXref>pubmed:22770225</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>Niaspan</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>acidum nicotinicum</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:16767301</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>PP factor</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:16945375</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>3-carboxypyridine</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>m-pyridinecarboxylic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasAlternativeId>CHEBI:44319</oboInOwl:hasAlternativeId>
        <oboInOwl:hasRelatedSynonym xml:lang="en">niacin (b3)</oboInOwl:hasRelatedSynonym>
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        <oboInOwl:hasDbXref>pubmed:113218</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>pellagra preventive factor</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>Nicotinic acid</oboInOwl:hasRelatedSynonym>
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        <oboInOwl:hasDbXref>pubmed:8423912</oboInOwl:hasDbXref>
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        <oboInOwl:hasDbXref>pubmed:582105</oboInOwl:hasDbXref>
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        <oboInOwl:hasAlternativeId>CHEBI:25538</oboInOwl:hasAlternativeId>
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        <oboInOwl:hasDbXref>chemspider:913</oboInOwl:hasDbXref>
        <ns3:IAO_0000115>A pyridinemonocarboxylic acid that is pyridine in which the hydrogen at position 3 is replaced by a carboxy group.</ns3:IAO_0000115>
        <oboInOwl:hasDbXref>drugbank:DB00627</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pdb-ccd:NIO</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>foodb.food:FDB001014</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:34117670</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>pyridine-carboxylique-3</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:15311728</oboInOwl:hasDbXref>
        <oboInOwl:hasExactSynonym>nicotinic acid</oboInOwl:hasExactSynonym>
        <oboInOwl:hasDbXref>pubmed:8306147</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:15205990</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>Nikotinsaeure</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:22155410</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:16322787</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>pyridine-beta-carboxylic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasExactSynonym>Nicotinic acid</oboInOwl:hasExactSynonym>
        <oboInOwl:hasRelatedSynonym>anti-pellagra vitamin</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>kegg.drug:D00049</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:699281</oboInOwl:hasDbXref>
        <oboInOwl:hasOBONamespace>chebi_ontology</oboInOwl:hasOBONamespace>
        <oboInOwl:hasDbXref>pubmed:12563315</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:4259917</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:24568240</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>beta-pyridinecarboxylic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:182198</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>acido nicotinico</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:15627518</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>cas:59-67-6</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>knapsack:C00000208</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:16449845</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>drugcentral:2835</oboInOwl:hasDbXref>
        <oboInOwl:hasExactSynonym>pyridine-3-carboxylic acid</oboInOwl:hasExactSynonym>
        <oboInOwl:hasDbXref>pubmed:33932650</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>P.P. factor</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:15037193</oboInOwl:hasDbXref>
        <ns4:smiles_string>O=C(O)c1cccnc1</ns4:smiles_string>
        <oboInOwl:hasDbXref>pubmed:19592242</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>Niacor</oboInOwl:hasRelatedSynonym>
        <ns4:generalized_empirical_formula>C6H5NO2</ns4:generalized_empirical_formula>
        <oboInOwl:hasDbXref>pubmed:9107536</oboInOwl:hasDbXref>
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        <oboInOwl:hasDbXref>wikipedia.en:Niacin</oboInOwl:hasDbXref>
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    <!-- http://purl.obolibrary.org/obo/CHEBI_176839 -->

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        <rdfs:label>vitamin B3</rdfs:label>
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<!-- Generated by the OWL API (version 3.2.4.1806) http://owlapi.sourceforge.net -->



