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 dinitrile that is tert-butylbenzene in which the hydrogen at the para- position is substituted by a 4,4-dicyano-2-methylbuta-1,3-dien-1-yl group (the trans isomer). It is used as a matrix in matrix-assisted laser desorption/ionization (MALDI) mass spectrometry.