N-{[4-((2R,3R)-1-(4-fluorophenyl)-3-{[2-(4-fluorophenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}glycyl-D-valine

(3R,4R)-1-(4-fluorophenyl)-3-[(4-fluorobenzoyl)methylthio]-4-[4-(t-butoxycarbonylmethoxy)phenyl]azetidin-2-one

tert-butyl (4-{[(4-fluorophenyl)imino]methyl}phenoxy)acetate

glycyl-D-valine hydrochloride

4-chlorophenyl {4-[(2R,3R)-1-(4-fluorophenyl)-3-{[(2RS)-2-(4-fluorophenyl)-2-hydroxyethyl]thio}-4-oxoazetidin-2-yl]phenoxy}acetate