3(R)-benzyloxycarbonylamino-N-(2,2-dimethoxy-ethyl)-succinamic acid tert-butyl ester
(R)-3-(((benzyloxy)carbonyl)amino)-4-oxo-4-(((R)-1-phenylethyl)amino)butanoic acid
benzyl ((R)-4-([1,4'-bipiperidin]-1'-yl)-1,4-dioxo-1-(((R)-1-phenylethyl)amino)butan-2-yl)carbamate
(R)-tert-butyl 3-((2R,3S)-2-((E)-3-iodostyryl)-4-oxo-3-((S)-2-oxo-4-phenyloxazolidin-3-yl)azetidin-1-yl)-4-oxo-4-(((R)-1-phenylethyl)amino)butanoate
(R)-tert-butyl 3-((2R,3S)-2-((E)-3-fluorostyryl)-4-oxo-3-((S)-2-oxo-4-phenyloxazolidin-3-yl)azetidin-1-yl)-4-oxo-4-(((R)-1-phenylethyl)amino)butanoate