4-(N-tert-butoxycarbonyl)amino-4-deoxy-1,2,3-tri-O-tert-butyldimethylsilyl-D-ribitol

(S)-2-((2S,3R,4S)-5-Azido-2-tert-butoxycarbonylamino-3,4-dihydroxy-pentanoylamino)-3-(3,5-dibromo-4-hydroxy-phenyl)-propionic acid methyl ester

4-(N-tert-butoxycarbonyl)amino-4-deoxy-1,2,3-tri-O-tert-butyldimethylsilyl-5-O-pivaloyl-D-ribitol