82232-19-7 Butanedioic acid, mono(2-(3,4-bis(4-chlorophenyl)-5-cyano-6-oxo-1(6H)-pyridazinyl)ethyl) ester Mono(2-(3,4-bis(4-chlorophenyl)-5-cyano-6-oxo-1(6H)-pyridazinyl)ethyl) butanedioate NSC 362453