(1R,4S)-1-O-benzyl-4-O-(tert-butyldimethylsilyl)cyclopent-2-ene-1,4-diol

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

Acetic acid (3aS,4R,6S,6aS)-6-(tert-butyl-dimethyl-silanyloxy)-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-yl ester

Acetic acid (1R,2R,3S,4S)-4-(tert-butyl-dimethyl-silanyloxy)-2,3-dihydroxy-cyclopentyl ester