(5R,6R)-6-ethyl-7-oxo-3-((R)-pantetheinyl)-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid 生成 (5R,6R)-6-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