Fmoc-O-叔丁基-L-酪氨酸 、
FMOC-L-精氨酸 、
N-FMOC-S-三苯甲基-L-高半胱氨酸 、
L-2-((9-fluorenylmethyloxycarbonyl)amino)-5,5-dimethoxypentanoic acid 、 alkaline earth salt of/the/ methylsulfuric acid 以15.6%的产率得到(3S)-4-[[(2S)-1-[[(4S,7S,10S,12aS)-10-[[(2S)-1-[(2S)-2-[[(1S)-1-carboxy-2-phenylethyl]carbamoyl]pyrrolidin-1-yl]-3-(1H-imidazol-5-yl)-1-oxopropan-2-yl]carbamoyl]-7-[(4-hydroxyphenyl)methyl]-5,8-dioxo-3,4,6,7,10,11,12,12a-octahydro-2H-pyrrolo[2,1-b][1,3,6]thiadiazecin-4-yl]amino]-5-(diaminomethylideneamino)-1-oxopentan-2-yl]amino]-3-amino-4-oxobutanoic acid