(S)-4-{(S)-[(2S,3S,4R,5R)-3-Benzyloxy-5-(tert-butyl-diphenyl-silanyloxymethyl)-4-(4-methoxy-benzyloxy)-tetrahydro-furan-2-yl]-hydroxy-methyl}-[1,3]dioxolan-2-one

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

2-[2-(2R,3R,4S,5S)-4-benzyloxy-5-((1S,2S)-1,2-isopropylidenedioxy-3-trityloxypropyl)-3-(4-methoxybenzyloxy)tetrahydrofuranyl]acetonitrile

(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

(E)-3-{(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-yl}-acrylic acid ethyl ester