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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC BY 3.0, For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.

Term:enol-oxaloacetic acid
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Accession:CHEBI:28394 term browser browse the term
Definition:A dicarboxylic acid that is butenedioic acid in which the hydrogen at the 2-position is substituted by a hydroxy group.
Synonyms:exact_synonym: (2Z)-2-hydroxybut-2-enedioic acid
 related_synonym: 2-Hydroxybut-2-enedioic acid;   Formula=C4H4O5;   InChI=1S/C4H4O5/c5-2(4(8)9)1-3(6)7/h1,5H,(H,6,7)(H,8,9)/b2-1-;   InChIKey=UWYVPFMHMJIBHE-UPHRSURJSA-N;   SMILES=OC(=O)\\C=C(/O)C(O)=O;   hydroxyfumaric acid
 alt_id: CHEBI:10547;   CHEBI:1158;   CHEBI:19638;   CHEBI:23911
 xref: Beilstein:3661871;   KEGG:C03981;   LIPID_MAPS_instance:LMFA01170061;   Reaxys:3661871
 cyclic_relationship: is_conjugate_base_of CHEBI:17479

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Path 1
Term Annotations click to browse term
  CHEBI ontology 19883
    chemical entity 19883
      molecular entity 19880
        polyatomic entity 19794
          heteroatomic molecular entity 19719
            hydroxides 19147
              organic hydroxy compound 18696
                enol 692
                  enol-oxaloacetic acid 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19883
    subatomic particle 19881
      composite particle 19881
        hadron 19881
          baryon 19881
            nucleon 19881
              atomic nucleus 19881
                atom 19881
                  main group element atom 19771
                    p-block element atom 19771
                      carbon group element atom 19679
                        carbon atom 19668
                          organic molecular entity 19668
                            organic group 18580
                              organic divalent group 18571
                                organodiyl group 18571
                                  carbonyl group 18479
                                    carbonyl compound 18479
                                      dicarboxylic acids and O-substituted derivatives 10300
                                        dicarboxylic acid 10291
                                          C4-dicarboxylic acid 809
                                            butenedioic acid 527
                                              enol-oxaloacetic acid 0
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