4-[(2R,3S,5S)-5-(2-Benzyloxy-ethyl)-3-hydroxy-tetrahydro-furan-2-yl]-butyric acid

((2R,4R,5R)-4-Hydroxy-5-trityloxymethyl-tetrahydro-furan-2-yl)-acetic acid ethyl ester

9-[4-((2S,4S,5R)-4-Methoxymethoxy-5-trityloxymethyl-tetrahydro-furan-2-yl)-butyl]-6-vinyl-9H-purin-2-ylamine

(2S,3S,5S)-5-(2-Benzyloxy-ethyl)-3-(tert-butyl-dimethyl-silanyloxy)-tetrahydro-furan-2-carbaldehyde

[(2R,3S,5S)-5-(2-Benzyloxy-ethyl)-2-(3-[1,3]dioxolan-2-yl-propyl)-tetrahydro-furan-3-yloxy]-tert-butyl-dimethyl-silane