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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.

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Accession:CHEBI:76639 term browser browse the term
Definition:A polyunsaturated fatty acid anion that is the conjugate base of 20-HEPE, obtained by deprotonation of the carboxy group; major species at pH 7.3.
Synonyms:exact_synonym: (5Z,8Z,11Z,14Z,17Z)-20-hydroxyicosa-5,8,11,14,17-pentaenoate
 related_synonym: (5Z,8Z,11Z,14Z,17Z)-20-hydroxyeicosapentaenoate;   (5Z,8Z,11Z,14Z,17Z)-20-hydroxyicosapentaenoate;   20-OH-C20:5(omega-3) (1-);   20-hydroxy-(5Z,8Z,11Z,14Z,17Z)-eicosapentaenoate;   20-hydroxy-(5Z,8Z,11Z,14Z,17Z)-icosapentaenoate;   Formula=C20H29O3;   InChI=1S/C20H30O3/c21-19-17-15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-18-20(22)23/h1,3-4,6-7,9-10,12-13,15,21H,2,5,8,11,14,16-19H2,(H,22,23)/p-1/b3-1-,6-4-,9-7-,12-10-,15-13-;   InChIKey=PPMOWWAALQWWLJ-NUKMUHRASA-M;   SMILES=OCC\\C=C/C\\C=C/C\\C=C/C\\C=C/C\\C=C/CCCC([O-])=O
 cyclic_relationship: is_conjugate_base_of CHEBI:76962

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  CHEBI ontology 21726
    chemical entity 21724
      molecular entity 21711
        ion 16620
          anion 15509
            organic anion 3089
              carboxylic acid anion 2433
                icosanoid anion 1
                  HEPE(1-) 0
                    20-HEPE(1-) 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 21726
    subatomic particle 21712
      composite particle 21712
        hadron 21712
          baryon 21712
            nucleon 21712
              atomic nucleus 21712
                atom 21712
                  main group element atom 21629
                    p-block element atom 21629
                      carbon group element atom 21433
                        carbon atom 21333
                          organic molecular entity 21333
                            organic ion 8611
                              organic anion 3089
                                carboxylic acid anion 2433
                                  monocarboxylic acid anion 1509
                                    fatty acid anion 105
                                      unsaturated fatty acid anion 1
                                        polyunsaturated fatty acid anion 1
                                          hydroxy polyunsaturated fatty acid anion 0
                                            HEPE(1-) 0
                                              20-HEPE(1-) 0
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