2,2,2-trichloroethyl (2S)-3-(chloromethyl)-2-[(2R,3R)-2-(4-nitrophenyl)sulfonylsulfanyl-4-oxo-3-[(2-phenylacetyl)amino]azetidin-1-yl]but-3-enoate 生成
(6R)-3-chloromethyl-8-oxo-7t-(2-phenyl-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester