(4S,5R)-5-(azidomethyl)-2,2-dimethyl-1,3-dioxolane-4-carboxylic acid

dibenzyl (2S,3R)-5-hydroxycarbamoyl-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl phosphate

dibenzyl (2S,3R)-5-carbamoyl-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl phosphate

{2-[(4S,5R)-5-(Bis-benzyloxy-phosphoryloxymethyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-1,1-difluoro-2-oxo-ethyl}-phosphonic acid diethyl ester