(4S)-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde
N-{(2S)-2-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2-hydroxyethyl}carbamic acid benzyl ester
methyl (4S,5R,Z)-3-N-benzyloxycarbonyl-5,6-isopropylidene-2-hexenoate
(2R,3S)-3-N-benzyloxycarbonyl-4-tert-butyldimethylsilyloxy-1,2-isopropylidenedioxy-butane
(2S,3R)-3,4-epoxy-1,2-O-isopropylidenebutane-1,2-diol