112445-66-6 3(2H)-Pyridazinone, 4,5-dihydro-2-(1H-benzimidazol-2-yl)-6-(4-methoxyphenyl)- 4,5-Dihydro-2-(1H-benzimidazol-2-yl)-6-(4-methoxyphenyl)-3(2H)-pyridazinone