(-)-(4S,5S)-2,2-Dimethyl-4-<3-(2-methyl-1,3-dioxolan-2-yl)propyl>-5-vinyl-1,3-dioxolane

(-)-(2S,3S)-2,3-Epoxy-1-tosyloxypent-4-ene

(-)-(4S,5S)-4-Tosyloxymethyl-5-vinyl-1,3-dioxolan-2-one

(-)-(2R,4S,5R)-2-Methyl-2-<2-(phenylsulfonyl)ethyl>-4-tosyloxymethyl-5-vinyl-1,3-dioxolane