Trifluoro-methanesulfonic acid (3R,4R,5S)-4-azido-5-(tert-butyl-diphenyl-silanyloxymethyl)-2-oxo-tetrahydro-furan-3-yl ester

(3R,4S,5S)-4-Azido-3-hydroxy-5-hydroxymethyl-dihydro-furan-2-one

3-azido-3-deoxy-1,2-O-isopropylidene-α-D-ribofuranose aldehyde

5-O-(tert-butyldiphenylsilyl)-1,2-O-isopropylidene-β-D-threo-pentofuranose-3-ulose