(5R-(3(R*),5-alpha,6-alpha(S*)))-3-((2-((3-((2,4-二羟基-3,3-二甲基-1-氧代丁基)氨基)-1-氧代丙基)氨基)乙基)硫代)-6-(1-羟基乙基)-7-氧代-1-氮杂双环(3.2.0)庚-2-烯-2-羧酸 生成 (5R,6S)-6-((S)-1-Hydroxy-ethyl)-7-oxo-3-(2-{3-[((R)-2,2,5,5-tetramethyl-[1,3]dioxane-4-carbonyl)-amino]-propionylamino}-ethylsulfanyl)-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester