methyl N-[1-(4-chlorophenyl)-5-cyano-4-methyl-6-oxopyridazin-3-yl]carbamate methyl N-[1-(4-chlorophenyl)-5-cyano-4-methyl-6-oxo-pyridazin-3-yl]carbamate N-[1-(4-chlorophenyl)-5-cyano-4-methyl-6-oxo-3-pyridazinyl]carbamic acid methyl ester N-[1-(4-chlorophenyl)-5-cyano-6-keto-4-methyl-pyridazin-3-yl]carbamic acid methyl ester methyl 1-(4-chlorophenyl)-5-cyano-4-methyl-6-oxo-1,6-dihydropyridazin-3-ylcarbamate A3570/0151475 ZINC01425322 MLS000681567 SMR000312244