(2S,3R)-2-Amino-3-{4,4'-bis-benzyloxy-3'-[(S)-2-benzyloxycarbonylamino-2-(2-trimethylsilanyl-ethoxycarbonyl)-ethyl]-biphenyl-3-yl}-3-hydroxy-propionic acid methyl ester

(R)-5-(2-benzyloxy-5-bromo)phenyl-3-tert-butoxycarbonyl-(S)-4-(methoxycarbonyl)oxazolidin-2-thione

3-(tert-butyl) 4-methyl (4S,5R)-5-(4,4'-bis(benzyloxy)-3'-formyl-[1,1'-biphenyl]-3-yl)-2-oxooxazolidine-3,4-dicarboxylate