(1R,2R,3S,4S)-1-O-benzyl-4-O-(tert-butyldimethylsilyl)cyclopentane-1,2,3,4-tetrol

(1R,2R,3R,4S,5S)-3,4-bis-O-(tert-butyldimethylsilyl)-5-iodo-1,2-O-isopropylidenecyclopentane-1,2,3,4-tetrol

(1R,2S,3S,4S)-1-O-benzyl-4-O-(tert-butyldimethylsilyl)-2,3-O-isopropylidenecyclopentane-1,2,3,4-tetrol

(1S,2S,3R,4S,5S)-4-O-acetyl-3-O-(tert-butyldimethylsilyl)-5-iodo-2,3-O-isopropylidenecyclopentane-1,2,3,4-tetrol