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 naphthofuran that is naphtho[2,3-b]furan-4,9-dione substituted by a hydroxy group at position 8 and a 1-hydroxyethyl group at position 2. Isolated from Tabebuia impetiginosa and Kigelia pinnata, it exhibits antineoplastic activity.