(1S,3R,4R,7S)-3-(6-amino-2-fluoro-9H-purin-9-yl)-1-(hydroxymethyl)-2,5-dioxabicyclo[2.2.1]heptan-7-ol

((1S,3R,4R,7S)-7-(benzyloxy)-3-(2,6-dimethoxy-9H-purin-9-yl)-2,5-dioxabicyclo[2.2.1]heptan-1-yl)methanol

((1S,3R,4R,7S)-3-(6-amino-2-(isobutylamino)-7H-purin-7-yl)-7-(benzyloxy)-2,5-dioxabicyclo[2.2.1]heptan-1-yl)methanol

5'-O-tert-butyldiphenylsilyl-5-methyl-3'-O,4'-C-methyleneuridine

N4-benzoyl-5'-O-tert-butyldiphenylsilyl-3'-O,4'-C-methylenecytidine