(1R,2S,3S,4S,5S)-2-O-benzyl-3,4-O-isopropylidene-5-(2-hydroxyethyl)-cyclopentane-1,2,3,4-tetrol

(1R,2R,3R,4S,5R)-1-O-mesyl-3,4-O-isopropylidene-5-acetoxymethyl-cyclopentane-1,2,3,4-tetrol

(1S,2R,3S,4S,5S)-1,2-isopropylidene-4-benzylamino-5-(2-hydroxyethyl)-1,2,3-cyclopentanetriol

(1S,2S,3S,4S,5S)-4-N-benzyl-5-acetoxymethyl-7,8-isopropylidenedioxy-2-oxa-4-azabicyclo[3.3.0]oct-3-one

(1R,2R,3R,4S,5R)-1-O-mesyl-3,4-O-isopropylidene-5-(2-O-tert-butyldimethylsilyl-hydroxyethyl)-cyclopentane-1,2,3,4-tetrol