129025-54-3 2-(4-Chlorophenyl)-3-ethyl-5-oxo-2,5-dihydro-4-pyridazinecarboxylic acid 4-Pyridazinecarboxylic acid, 2-(4-chlorophenyl)-3-ethyl-2,5-dihydro-5-oxo- Clofencet Genesis HSDB 7008 SC 1158