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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:142640 term browser browse the term
Definition:A member of the class of nectriapyrones that is pyran-2-one which is substituted at positions 3, 4, and 6 by methyl, hydroxy, and but-2-en-2-yl groups, respectively in which the butenyl substituent has E configuration.
Synonyms:exact_synonym: 6-[(2E)-but-2-en-2-yl]-4-hydroxy-3-methyl-2H-pyran-2-one
 related_synonym: Formula=C10H12O3;   InChI=1S/C10H12O3/c1-4-6(2)9-5-8(11)7(3)10(12)13-9/h4-5,11H,1-3H3/b6-4+;   InChIKey=OBAWNXJOHPSFMJ-GQCTYLIASA-N;   SMILES=C=1(C=C(OC(C1C)=O)/C(/C)=C/C)O;   demethylnectriapyrone
 xref: PMID:30443971

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Term Annotations click to browse term
  CHEBI ontology 19821
    chemical entity 19821
      molecular entity 19819
        polyatomic entity 19740
          heteroatomic molecular entity 19682
            hydroxides 19180
              organic hydroxy compound 18672
                desmethylnectriapyrone 0
                  nectriapyrone + 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19821
    subatomic particle 19819
      composite particle 19819
        hadron 19819
          baryon 19819
            nucleon 19819
              atomic nucleus 19819
                atom 19819
                  main group element atom 19716
                    p-block element atom 19716
                      carbon group element atom 19640
                        carbon atom 19630
                          organic molecular entity 19630
                            organic group 18737
                              organic divalent group 18728
                                organodiyl group 18728
                                  carbonyl group 18675
                                    carbonyl compound 18675
                                      carboxylic ester 15884
                                        lactone 11242
                                          delta-lactone 3868
                                            2-pyranones 754
                                              nectriapyrones 0
                                                desmethylnectriapyrone 0
                                                  nectriapyrone + 0
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