2-[2,2-Bis-methylsulfanyl-4-oxo-3-(2-phenoxy-acetylamino)-azetidin-1-yl]-3-methyl-but-2-enoic acid benzhydryl ester 在
silica gel 作用下,
以
乙醚 为溶剂,
生成 2-[3,3-Bis-methylsulfanyl-2-(2-phenoxy-acetylamino)-acryloylamino]-3-methyl-but-2-enoic acid benzhydryl ester