methyl (2S,3S,4R)-3-acetoxy-4-<ethyl>-N-(o-nitrophenylthio)amino>methyl>-4-methoxypyridine-2-carbonyl>-erythro-β-tert-butoxy-L-histidyl>amino>-2-methylpentanoate 在
sodium hydroxide 作用下,
以
甲醇 为溶剂,
以62%的产率得到(2S,3S,4R)-4-[(2S,3R)-3-tert-Butoxy-2-[(6-{[[(R)-2-carbamoyl-2-(2-nitro-phenylsulfanylamino)-ethyl]-(2-nitro-phenylsulfanyl)-amino]-methyl}-4-methoxy-pyridine-2-carbonyl)-amino]-3-(1H-imidazol-4-yl)-propionylamino]-3-hydroxy-2-methyl-pentanoic acid