(4-nitrophenyl)methyl (2S,5R,6R)-3,3-dimethyl-4,4,7-trioxo-6-[(2-phenoxyacetyl)amino]-4lambda6-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 生成
(4-nitrophenyl)methyl (2S,5R,6S)-3,3-dimethyl-4,4,7-trioxo-6-[(2-phenoxyacetyl)amino]-4λ6-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate