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 monocarboxylic acid that is 2-chloro-4-fluorophenylacetic acid in which the phenyl group is substituted at position 5 by a 4-chloro-5-(difluoromethoxy)-1-methylpyrazol-3-yl group. A protoporphyrinogen oxidase inhibitor, it is used (usually as the corresponding ethyl ester proherbicide, pyraflufen-ethyl) for the control of broad-leaved weeds and grasses in a variety of crops.