(S)-4-((S)-4-hydroxy-6-aza-spiro[2. 5]oct-6-yl)-2-((R)-3-methyl-7-oxo-[1,4]diazepan-1-yl)-butyric acid methyl ester dihydrochloride 、
间氯苯异氰酸酯 以gave the title compound in 59% yield as off-white solid的产率得到(S)-2-[(R)-4-(3-chloro-phenylcarbamoyl)-3-methyl-7-oxo-[1,4]diazepan-1-yl]-4-((S)-4-hydroxy-6-aza-spiro[2.5]oct-6-yl)-butyric acid methyl ester