4-acetoxy-1-(4-methoxyphenyl)-3-(methylethylidene)azetidin-2-one

3-甲基巴豆酰氯

1-p-anisyl-3-isopropylidene-4-carboxy-2-azetidinone

cis-1-p-Methoxyphenyl-3-isopropenyl-4-ethoxycarbonylazetidinone

1-p-anisyl-3-isopropylidene-4-carbethoxy-2-azetidinone