(3aS,6R,6aS)-2,2,6-Trimethyl-dihydro-furo[3,4-d][1,3]dioxol-4-one

(3aR,6R,6aR)-2,2,6-trimethyltetrahydro-2H-furo(3,4-d)(1,3)dioxol-4-ol

(2R,3R)-2,3-dihydroxy-pent-4-enoic acid dipropylamide

(2R,3R)-2,3-O-isopropylidene-pent-4-enoic acid dipropylamide

(4S,5R)-2,2-dimethyl-4-(methanesulfonyloxy)methyl-5-vinyl-1,3-dioxlane