(3aR,6S,6aS)-6-methoxy-2,2-dimethyldihydrofuro[3,4-d][1,3]dioxol-4(3aH)-one

(2S,3S,4S,5R)-1-methylene-2,3-O-isopropylidene-2,3-dihydroxy-4,5-epoxycyclopentane

(1R,2R,3R,4S)-1-bromo-3,4-O-isopropylidene-5-methylenecyclopentane-2,3,4-triol

(1R,2R,3S,4S)-1-bromo-2-O-(N-benzylcarbamoyl)-3,4-O-isopropylidene-5-methylenecyclopentane-2,3,4-triol

(1R,2R,3S,4S,5R)-1-bromo-2-O-(N-benzylcarbamoyl)-5-(hydroxymethyl)-3,4-O-isopropylidenecyclopentane-2,3,4-triol