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.
An organic heterotetracyclic compound that is 7-phenyl-5-imino-5,7-dihydrobenzo[a]phenazine-3-sulfonic acid in which the imino hydrogen is replaced by a 2,4-disulfophenyl group. The disodium salt is the biological stain 'azocarmine B'.