methyl 4-(o-aminophenylamino)butyrate 、 (R)-3-(4-amino-3,5-dibromo-phenyl)-2-{[4-(2-oxo-1,2,4,5-tetrahydro-benzo[d][1,3]diazepin-3-yl)-piperidin-1-carbonyl]-amino}-propionic acid 以55%的产率得到methyl 4-[2-((R)-2-(4-amino-3,5-dibromo-phenyl)-1-{[4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidin-1-carbonyl]-amino}-ethyl)-benzimidazol-1-yl]-butyrate