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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:65856 term browser browse the term
Definition:A sesquiterpene lactone that is the 5alpha-epoxy derivative of alantolactone. Isolated from the root extracts of Inula helenium, it exhibits antimycobacterial activity.
Synonyms:exact_synonym: (1aR,2S,5aR,6aR,9aR,9bS)-2,5a-dimethyl-9-methylideneoctahydro-2H-oxireno[4,4a]naphtho[2,3-b]furan-8(9H)-one
 related_synonym: Formula=C15H20O3;   InChI=1S/C15H20O3/c1-8-5-4-6-14(3)7-10-11(9(2)13(16)17-10)12-15(8,14)18-12/h8,10-12H,2,4-7H2,1,3H3/t8-,10+,11+,12-,14+,15-/m0/s1;   InChIKey=YIQKVCDNUFDAHB-HKKVUVRFSA-N;   SMILES=[H][C@@]12C[C@@]3(C)CCC[C@H](C)[C@@]33O[C@H]3[C@]1([H])C(=C)C(=O)O2
 xref: PMID:10364842;   Reaxys:5031399

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Term Annotations click to browse term
  CHEBI ontology 19853
    role 19804
      biological role 19804
        biochemical role 19339
          metabolite 19319
            5alpha-epoxyalantolactone 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19853
    subatomic particle 19851
      composite particle 19851
        hadron 19851
          baryon 19851
            nucleon 19851
              atomic nucleus 19851
                atom 19851
                  main group element atom 19744
                    p-block element atom 19744
                      carbon group element atom 19650
                        carbon atom 19639
                          organic molecular entity 19639
                            organic group 18550
                              organic divalent group 18541
                                organodiyl group 18541
                                  carbonyl group 18447
                                    carbonyl compound 18447
                                      carboxylic ester 14370
                                        lactone 5988
                                          terpene lactone 1771
                                            sesquiterpene lactone 1620
                                              alantolactone 11
                                                5alpha-epoxyalantolactone 0
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