2,2-Dimethyl-propionic acid (4S,5S)-5-[(2R,3S,4R,5R)-3-benzyloxy-5-(tert-butyl-diphenyl-silanyloxymethyl)-4-hydroxy-tetrahydro-furan-2-yl]-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester

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

2-[(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]-ethanol

Toluene-4-sulfonic acid (2R,3R,4S,5R)-4-benzyloxy-5-((4S,5S)-2,2-dimethyl-5-trityloxymethyl-[1,3]dioxolan-4-yl)-3-(4-methoxy-benzyloxy)-tetrahydro-furan-2-ylmethyl ester

(2S,3S,4R,5R)-3-benzyloxy-5-hydroxymethyl-2-((1S,2S)-1,2-isopropylidenedioxy-3-trityloxypropyl)-4-(4-methoxybenzyloxy)tetrahydrofuran