N-(4-dimethylamino-butyl)-benzene-1,2-diamine 、 3-(3,4-diethyl-phenyl)-2-{[4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidin-1-carbonyl]-amino}-propionic acid 以29%的产率得到4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidin-1-carboxylic acid {2-(3,4-diethyl-phenyl)-1-[1-(4-dimethylamino-butyl)-1H-benzimidazol-2-yl]-ethyl}-amide