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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:9060 term browser browse the term
Definition:A germacranolide that has formula C16H20O4.
Synonyms:related_synonym: Formula=C16H20O4;   InChI=1S/C16H20O4/c1-10-5-4-6-12(16(18)19-3)7-8-13-11(2)15(17)20-14(13)9-10/h5,7,13-14H,2,4,6,8-9H2,1,3H3/b10-5+,12-7-/t13-,14+/m1/s1;   InChIKey=OXZSJXCNOUZXAQ-SOVPUBKQSA-N;   SMILES=COC(=O)C1=C\\C[C@H]2[C@H](C\\C(C)=C\\CC\\1)OC(=O)C2=C
 xref: CAS:76045-40-4;   KEGG:C09548;   KNApSAcK:C00003367

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Path 1
Term Annotations click to browse term
  CHEBI ontology 19792
    chemical entity 19791
      atom 19788
        nonmetal atom 19662
          carbon atom 19560
            organic molecular entity 19560
              isoprenoid 9607
                terpene 9607
                  sesquiterpene 2694
                    germacrane 16
                      germacranolide 6
                        Scorpioidin 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19792
    subatomic particle 19788
      composite particle 19788
        hadron 19788
          baryon 19788
            nucleon 19788
              atomic nucleus 19788
                atom 19788
                  main group element atom 19675
                    p-block element atom 19675
                      carbon group element atom 19571
                        carbon atom 19560
                          organic molecular entity 19560
                            organic group 18508
                              organic divalent group 18501
                                organodiyl group 18501
                                  carbonyl group 18404
                                    carbonyl compound 18404
                                      carboxylic ester 14089
                                        lactone 5987
                                          terpene lactone 1770
                                            sesquiterpene lactone 1619
                                              germacranolide 6
                                                Scorpioidin 0
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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.