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 oleana-11,13(18)-diene substituted by a alpha-hydroxy group at position 3, an oxo group at position 23 and a carboxy group at position 28. Isolated from the leaves and twigs of Fatsia polycarpa, it exhibits anti-HBV activity.