benzyl 4'-bromomethyl-biphenyl-2-carboxylate 、 1-(2'-benzyloxycarbonylbiphenylyl-4-methyl)-5-(1-benzyloxycarbonyl-1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)-2-butyl-benzimidazole 生成
2-butyl-1-(2'-carboxybiphenylyl-4-methyl)-5-(1-carboxymethyl-1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)-benzimidazole 、 1-(2'-benzyloxycarbonyl-biphenylyl-4-methyl)-2-butyl-5-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)-benzimidazole