2,5-anhydro-6-O-benzyl-1-bromo-3,4-O-isopropylidene-D-altro-hexitol

(3aS,4R,8aS)-4-Benzyloxymethyl-2,2-dimethyl-3a,4,6,8a-tetrahydro-[1,3]dioxolo[4,5-c]oxepine

1-[(4S,5R)-5-(1-Benzyloxymethyl-vinyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-ethane-1,2-diol