(S)-3-氨基-2,3,4,5-四氢-2-氧代-1H-1-苯并氮杂卓-1-乙酸乙酯 、
(2S,3S)-2-acetylthio-3,4-dimethylpentanoic acid 以Thus, 0.420 g of the title compound was obtained的产率得到(3S)-[[(2S,3S)-2-Acetylthio-3,4-dimethyl-1-oxopentyl]amino]-1-ethoxycarbonylmethyl-2,3,4,5-tetrahydro-1H-[1]benzazepin-2-one