112445-67-7 3(2H)-Pyridazinone, 4,5-dihydro-2-(1H-benzimidazol-2-yl)-6-(4-chlorophenyl)- 4,5-Dihydro-2-(1H-benzimidazol-2-yl)-6-(4-chlorophenyl)-3(2H)-pyridazinone