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 arenesulfonic acid that is 3-[(4-amino-3-methylphenyl)(4-aminophenyl)methylidene]-6-iminocyclohexa-1,4-diene-1-sulfonic acid in which the hydrogens ortho to the amino functions are replaced by phenyl groups. The disodium salt is the biological stain 'acid fuchsin'.