{4-[(2R,3R)-1-(4-fluorophenyl)-3-({2-hydroxy-2-[4-(methylthio)phenyl]ethyl}thio)-4-oxoazetidin-2-yl]phenoxy}acetic acid

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

1-[4-(methylthio)phenyl]-2-[(3-nitropyridin-2-yl)thio]ethanone

tert-butyl {4-[(2R,3R)-1-(4-fluorophenyl)-3-({2-[4-(methylthio)phenyl]-2-oxoethyl}thio)-4-oxoazetidin-2-yl]phenoxy}acetate

(3R,4R)-1-(4-fluorophenyl)-3-[(3-nitropyridin-2-yl)dithio]-4-[4-(t-butoxycarbonylmethoxy)phenyl]azetidin-2-one

tert-butyl (4-{(1R)-1-[(4-fluorophenyl)amino]-2-[(4-methoxybenzyl)thio]-3-oxo-3-[(4S)-2-oxo-4-phenyl-1,3-oxazolidin-3-yl]propyl}phenoxy)acetate