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    <!-- http://purl.obolibrary.org/obo/CHEBI_18300 -->

    <Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_18300">
        <rdfs:label>maleic acid</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/CHEBI_22958"/>
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        <oboInOwl:hasAlternativeId>CHEBI:6653</oboInOwl:hasAlternativeId>
        <oboInOwl:hasDbXref>PMID:9591280</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>(Z)-butenedioic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>Beilstein:1903639</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>Beilstein:605762</oboInOwl:hasDbXref>
        <ns5:mass>116.07216</ns5:mass>
        <ns5:inchikey>VZCYOOQTPOCHFL-UPHRSURJSA-N</ns5:inchikey>
        <oboInOwl:hasAlternativeId>CHEBI:43836</oboInOwl:hasAlternativeId>
        <oboInOwl:hasDbXref>KEGG:C01384</oboInOwl:hasDbXref>
        <oboInOwl:hasExactSynonym>MALEIC ACID</oboInOwl:hasExactSynonym>
        <oboInOwl:hasOBONamespace>chebi_ontology</oboInOwl:hasOBONamespace>
        <oboInOwl:hasExactSynonym>(2Z)-but-2-enedioic acid</oboInOwl:hasExactSynonym>
        <oboInOwl:hasRelatedSynonym>cis-Butenedioic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>H2male</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>PMID:11386868</oboInOwl:hasDbXref>
        <oboInOwl:hasExactSynonym>Maleic acid</oboInOwl:hasExactSynonym>
        <oboInOwl:hasDbXref>PMID:22770225</oboInOwl:hasDbXref>
        <ns5:charge>0</ns5:charge>
        <oboInOwl:hasRelatedSynonym>cis-but-2-enedioic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>KNApSAcK:C00007417</oboInOwl:hasDbXref>
        <ns5:monoisotopicmass>116.01096</ns5:monoisotopicmass>
        <oboInOwl:hasDbXref>Wikipedia:Maleic_acid</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>toxilic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>MetaCyc:MALEATE</oboInOwl:hasDbXref>
        <oboInOwl:hasAlternativeId>CHEBI:25119</oboInOwl:hasAlternativeId>
        <oboInOwl:hasDbXref>PMID:10952545</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>PDBeChem:MAE</oboInOwl:hasDbXref>
        <ns5:smiles>OC(=O)\C=C/C(O)=O</ns5:smiles>
        <ns4:IAO_0000115>A butenedioic acid in which the double bond has cis- (Z)-configuration.</ns4:IAO_0000115>
        <ns5:inchi>InChI=1S/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/b2-1-</ns5:inchi>
        <oboInOwl:hasDbXref>Reaxys:605762</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>(Z)-2-butenedioic acid</oboInOwl:hasRelatedSynonym>
        <ns5:formula>C4H4O4</ns5:formula>
        <oboInOwl:hasRelatedSynonym>cis-1,2-ethylenedicarboxylic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>DrugBank:DB04299</oboInOwl:hasDbXref>
        <oboInOwl:id>CHEBI:18300</oboInOwl:id>
        <oboInOwl:hasDbXref>Gmelin:49854</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>cis-ethene-1,2-dioic acid</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>HMDB:HMDB0000176</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>CAS:110-16-7</oboInOwl:hasDbXref>
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    <!-- http://purl.obolibrary.org/obo/CHEBI_22958 -->

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        <rdfs:label>butenedioic acid</rdfs:label>
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    <!-- http://purl.obolibrary.org/obo/CHEBI_37156 -->

    <Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_37156">
        <rdfs:label>maleate(1-)</rdfs:label>
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    <!-- http://purl.obolibrary.org/obo/CHEBI_75771 -->

    <Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_75771">
        <rdfs:label>mouse metabolite</rdfs:label>
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    <!-- http://purl.obolibrary.org/obo/CHEBI_76924 -->

    <Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_76924">
        <rdfs:label>plant metabolite</rdfs:label>
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    <!-- http://purl.obolibrary.org/obo/CHEBI_84735 -->

    <Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_84735">
        <rdfs:label>algal metabolite</rdfs:label>
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