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 carbotricyclic compound and sesquiterpene that is decahydro-1H-cyclopropa[e]azulene which is substituted by methyl groups at positions 1, 1, and 4, and by a methylidene group at position 7 (the (1aR,4R,4aR,7aR,7bR)- stereoisomer). It has been isolated from several plant species such as Acorus calamus and Pinus peuce.