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 pentacyclic triterpenoid that is picene which has been fully hydrogenated except for a double bond between the 4a and 5 positions and is substituted by methyl groups at the 4, 4, 6bbeta, 8abeta, 11, 11, 12balpha and 14bbeta positions, and by a hydroxy group at the 3beta position.