The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/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.
A germacrane sesquiterpenoid in which the 10-membered ring contains one E- and one Z- double bond and is fused to a 3-methylenedihydrofuran-2(3H)-one moiety. It has been isolated from Artemesia arbuscala, Anthemis altissima and Tanacetum vulgare.