tert-butyl N-[(benzyloxy)carbonyl]glycyl-D-valinate

(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