(2R,3R,5S,6S)-2-t-butyldimethylsilyloxymethyl-3-vinyl-5,6-dimethoxy-5,6-dimethyl-1,4-dioxane

(2S,3R,5S,6S)-2-(1'-hydroxy-3'-trimethylsilyl-prop-2'-yn-1'-yl)-3-vinyl-5,6-dimethoxy-5,6-dimethyl-1,4-dioxane

(2S,3R,5S,6S)-2-(1'-hydroxy-prop-2'-yn-1'-yl)-3-vinyl-5,6-dimethoxy-5,6-dimethyl-1,4-dioxane

(2S,3R,5S,6S)-3-vinyl-5,6-dimethoxy-5,6-dimethyl-1,4-dioxane-2-carbaldehyde

(2R,3R,5S,6S)-2-hydroxymethyl-3-vinyl-5,6-dimethoxy-5,6-dimethyl-1,4-dioxane