甲酸 、
tert-butyl N-[(2S)-1-[[(3S,6S,7S,9aS)-3-(benzhydrylcarbamoyl)-7-(hydroxymethyl)-5-oxo-1,2,3,6,7,8,9,9a-octahydropyrrolo[1,2-a]azepin-6-yl]amino]-1-oxobutan-2-yl]-N-methylcarbamate 以74%的产率得到(3S,6S,7S,9aS)-N-benzhydryl-7-(hydroxymethyl)-6-[[(2S)-2-(methylamino)butanoyl]amino]-5-oxo-1,2,3,6,7,8,9,9a-octahydropyrrolo[1,2-a]azepine-3-carboxamide;formic acid