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    <!-- http://purl.obolibrary.org/obo/CHEBI_33709 -->

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        <rdfs:label>amino acid</rdfs:label>
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    <!-- http://purl.obolibrary.org/obo/CHEBI_4828 -->

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        <rdfs:label>ergothioneine</rdfs:label>
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        <oboInOwl:hasDbXref>pubmed:18841979</oboInOwl:hasDbXref>
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        <oboInOwl:hasRelatedSynonym>L-ergothioneine</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasExactSynonym>(2S)-3-(2-mercapto-1H-imidazol-5-yl)-2-(trimethylazaniumyl)propanoate</oboInOwl:hasExactSynonym>
        <ns4:inchi_string>InChI=1S/C9H15N3O2S/c1-12(2,3)7(8(13)14)4-6-5-10-9(15)11-6/h5,7H,4H2,1-3H3,(H2-,10,11,13,14,15)/t7-/m0/s1</ns4:inchi_string>
        <oboInOwl:hasDbXref>pubmed:15744438</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:26229105</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:17616140</oboInOwl:hasDbXref>
        <ns4:smiles_string>C[N+](C)(C)[C@@H](Cc1cnc(S)n1)C(=O)[O-]</ns4:smiles_string>
        <oboInOwl:hasDbXref>pubmed:27306320</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>thiolhistidinebetaine</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:26149121</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:23418129</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:27444382</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:24392160</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>ergothionine</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:26921894</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>2-mercaptohistidine trimethylbetaine</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>sympectothion</oboInOwl:hasRelatedSynonym>
        <ns4:generalized_empirical_formula>C9H15N3O2S</ns4:generalized_empirical_formula>
        <oboInOwl:hasDbXref>pubmed:7144630</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:27134772</oboInOwl:hasDbXref>
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        <oboInOwl:hasDbXref>pubmed:26338495</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:19660151</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:25154712</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:26772879</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:26994919</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>3-(2-sulfanylidene-1,3-dihydroimidazol-4-yl)-2-trimethylammonio-propanoate</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>(S)-(1-carboxy-2-(2-mercaptoimidazol-4-yl)ethyl)trimethylammonium hydroxide</oboInOwl:hasRelatedSynonym>
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        <oboInOwl:hasDbXref>pubmed:25736892</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:26079795</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>hmdb:HMDB0003045</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:26542137</oboInOwl:hasDbXref>
        <oboInOwl:hasOBONamespace>chebi_ontology</oboInOwl:hasOBONamespace>
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        <oboInOwl:hasDbXref>pubmed:23922985</oboInOwl:hasDbXref>
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        <oboInOwl:hasRelatedSynonym>(2S)-3-(2-mercapto-1H-imidazol-5-yl)-2-(trimethylammonio)propanoate</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>(alphaS)-alpha-carboxy-2,3-dihydro-N,N,N-trimethyl-2-thioxo-1H-imidazole-4-ethanaminium inner salt</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasRelatedSynonym>thiolhistidine-betaine</oboInOwl:hasRelatedSynonym>
        <oboInOwl:hasDbXref>pubmed:20420449</oboInOwl:hasDbXref>
        <ns3:IAO_0000115>A &lt;small&gt;L&lt;/small&gt;-histidine derivative that is &lt;em&gt;N&lt;/em&gt;&lt;small&gt;&lt;sup&gt;α&lt;/small&gt;&lt;/sup&gt;,&lt;em&gt;N&lt;/em&gt;&lt;small&gt;&lt;sup&gt;α&lt;/small&gt;&lt;/sup&gt;,&lt;em&gt;N&lt;/em&gt;&lt;small&gt;&lt;sup&gt;α&lt;/small&gt;&lt;/sup&gt;-trimethyl-&lt;small&gt;L&lt;/small&gt;-histidine in which the hydrogen at position 2 on the imdazole ring is replaced by a mercapto group. A naturally occurring metabolite of histidine synthesized by bacteria and fungi with antioxidant properties. It is found ubiquitously in plants and animals and is present in many human foodstuffs.</ns3:IAO_0000115>
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        <oboInOwl:hasDbXref>kegg.compound:C05570</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:18670092</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>pubmed:27101740</oboInOwl:hasDbXref>
        <oboInOwl:hasDbXref>metacyc.compound:CPD-15276</oboInOwl:hasDbXref>
        <oboInOwl:hasRelatedSynonym>L-thioneine</oboInOwl:hasRelatedSynonym>
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