2,2-Dimethyl-propionic acid (4S,5S)-5-((4aR,6R,7R,7aS)-7-benzyloxy-2,2-dimethyl-tetrahydro-furo[3,2-d][1,3]dioxin-6-yl)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester

{(2R,3S,3aR,4aS,7R,8aS,9S,9aR)-7-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3,9-bis-triethylsilanyloxy-decahydro-furo[3,2-b]pyrano[2,3-e]pyran-2-yl}-acetic acid

{(2R,3S,3aR,4aS,7R,8aS,9S,9aR)-7-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3,9-bis-triethylsilanyloxy-decahydro-furo[3,2-b]pyrano[2,3-e]pyran-2-yl}-acetic acid methyl ester

(4R,5R)-5-[(2S,3R,4S,5R)-4-Methoxymethoxy-3-triethylsilanyloxy-5-(2-trityloxy-ethyl)-tetrahydro-furan-2-yl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde

(2R,4R,5S)-4-Benzyloxy-2-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-5-((4S,5S)-2,2-dimethyl-5-trityloxymethyl-[1,3]dioxolan-4-yl)-dihydro-furan-3-one