[2-oxo-3-(2-oxo-4-phenyl-oxazolidin-3-yl)-4-styryl-azetidin-1-yl]-acetic acid tert-butyl ester

[2-oxo-3-(2-oxo-4-phenyl-oxazolidin-3-yl)-4-styryl-azetidin-1-yl]-acetic acid benzyl ester

2-[2-oxo-3-(2-oxo-4-phenyl-oxazolidin-3-yl)-4-styryl-azetidin-1-yl]-malonic acid tert-butyl ester 2,2,2-trichloro-ethyl ester

2-[2-oxo-3-(2-oxo-4-phenyl-oxazolidin-3-yl)-4-styryl-azetidin-1-yl]-N-(3-trifluoromethyl-benzyl)-malonamic acid tert-butyl ester

(+)-(3S,4R)-1-(2-bromophenyl)-3-[(S)-4-phenyl-2-oxo-1,3-oxazolidin-3-yl]-4-(E)-styryl-azetidin-2-one