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 carbohydrazide obtained by formal condensation of one of the carboxy groups from butylmalonic acid with the hydrazino group of 1,2-diphenylhydrazine. Used (as its calcium semihydrate) for treatment of rheumatoid arthritis.