(1R,2S,3S,4R,5R)-1-Amino-4,5,6-trihydroxy-5-(hydroxymethyl)cyclopentane

((1R)-2c-amino-3t,4c,5t-tris-benzyloxy-cyclopentyl)-methanol

(1R,5R,6R,7S,8S)-6,7,8-tri-O-benzyl-3-oxa-2-azabicyclo[3.3.0]octane-6,7,8-triol

Methyl-3,4-carbonato-6-O-(t-butyldimethylsilyl)-β-D-galaktopyranosid