(4R,5S)-4-[(R)-2-(tert-Butyl-diphenyl-silanyloxy)-1-methoxymethoxy-ethyl]-5-((R)-1-methoxymethoxy-3-trimethylsilanyl-prop-2-ynyl)-2,2-dimethyl-[1,3]dioxolane

(4R,5S)-4-[(R)-2-(tert-Butyl-diphenyl-silanyloxy)-1-methoxymethoxy-ethyl]-5-((S)-1-methoxymethoxy-3-trimethylsilanyl-prop-2-ynyl)-2,2-dimethyl-[1,3]dioxolane

tert-Butyl-{(R)-2-methoxymethoxy-2-[(4R,5S)-5-((S)-1-methoxymethoxy-3-phenyl-prop-2-ynyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-ethoxy}-diphenyl-silane

3-[(3aS,4S,6R,6aR)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-pyrrole-2,5-dione

3-[(3aS,4R,6R,6aR)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-pyrrole-2,5-dione