(4R,6S)-4-[(S)-2-(tert-Butyl-dimethyl-silanyloxy)-but-3-ynyl]-2,2-dimethyl-6-[(2R,4R)-2,4,5-tris-(tert-butyl-dimethyl-silanyloxy)-pentyl]-[1,3]dioxane

(2R,4S,6R,8R)-2,8-Bis-(tert-butyl-dimethyl-silanyloxy)-1-{(4R,6S)-2,2-dimethyl-6-[(2R,4R)-2,4,5-tris-(tert-butyl-dimethyl-silanyloxy)-pentyl]-[1,3]dioxan-4-yl}-10-trimethylsilanyl-dec-9-yne-4,6-diol

carbonic acid tert-butyl ester 5-(tert-butyl-dimethyl-silanyloxy)-1-[2-(tert-butyl-dimethyl-silanyloxy)-4-trimethylsilanyl-but-3-ynyl]-6-{2,2-dimethyl-6-[2,4,5-tris-(tert-butyl-dimethyl-silanyloxy)-pentyl]-[1,3]dioxan-4-yl}-hex-3-ynyl ester