(4S,4'S)-4,4'-((4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-diyl)bis(N-(tert-butyl)-4,5-dihydrothiazol-2-amine)

{(S)-2-[(4R,5R)-5-((S)-2-tert-Butoxycarbonylamino-1-hydroxy-ethyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-2-hydroxy-ethyl}-carbamic acid tert-butyl ester

{(R)-2-Benzyloxy-1-[(4R,5R)-5-((R)-2-benzyloxy-1-tert-butoxycarbonylamino-ethyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-ethyl}-carbamic acid tert-butyl ester

2,5-di-O-benzyl-3,4-O-isopropylidene-L-iditol

2,5-di-O-benzyl-3,4-O-isopropylidene-L-idaric acid