2,2-Dimethyl-propionic acid (4S,5S)-5-[(2S,3R,4S,5R)-4-methoxymethoxy-3-triethylsilanyloxy-5-(2-trityloxy-ethyl)-tetrahydro-furan-2-yl]-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester

[(2R,3S,3aR,4aS,7R,8aS,9S,9aR)-3,9-Diacetoxy-2-(2-trityloxy-ethyl)-decahydro-furo[3,2-b]pyrano[2,3-e]pyran-7-yl]-acetic acid methyl ester

(2R,3R,4R,5R)-5-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2-((4S,5S)-5-hydroxymethyl-2,2-dimethyl-[1,3]dioxolan-4-yl)-4-methoxymethoxy-tetrahydro-furan-3-ol

{2-[(2R,3S,4R,5R)-4-Benzyloxy-5-((4S,5S)-2,2-dimethyl-5-trityloxymethyl-[1,3]dioxolan-4-yl)-3-methoxymethoxy-tetrahydro-furan-2-yl]-ethoxy}-tert-butyl-dimethyl-silane

(E)-5-[(3aS,4S,5aR,6S,7R,8aR,8bR)-6-Methoxymethoxy-2,2-dimethyl-7-(2-trityloxy-ethyl)-hexahydro-[1,3]dioxolo[4,5]furo[2,3-b]pyran-4-yl]-pent-2-enoic acid methyl ester