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

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

(1S,2S,3S,4S,5S)-4-N-benzyl-6-(2-O-tert-butyldimethylsilyl-hydroxyethyl)-7,8-isopropylidenedioxy-2-oxa-4-azabicyclo[3.3.0]octan-3-one

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

(1S,2S,3S,4S,5R)-4-N-benzylamino-5-hydroxymethyl-cyclopentane-1,2,3-triol