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

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

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