ethyl (2R,3R)-3,4-O-isopropylidene-2,3,4-trihydroxybutanoate

2,3-di-O-benzyl-4,5-O-isopropylidene-D-arabinitol

(+)-(3S,4R)-3-benzyloxy-4,5-O-isopropylidene-4,5-dihydroxy-1-pentene

(1R,4'R)-1-(2,2-dimethyl-1,3-dioxolane-4-yl)-2-trimethylsilylprop-2-en-1-ol