(2R,11aR)-2-hydroxy-10-[4-[(2-phenylbenzoyl)amino]benzoyl]-1,2,3,10,11,11a-hexahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one 以66.6%的产率得到(2S,11aR)-2-acetoxy-10-[4-[(2-phenylbenzoyl)amino]benzoyl]-1,2,3,10,11,11a-hexahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one