5′-Uridylic acid, 5′→P:5′′′→P′-dianhydride with imidodiphosphoric acid

5′-Uridylic acid, 5′→P:5′′′→P′-dianhydride with P,P′-(difluoromethylene)bis[phosphonic acid]

Imidazo[1,2-c]pyrimidin-5(6H)-one, 6-[5-O-[hydroxy[[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]oxy]phosphinyl]-β-D-ribofuranosyl]-, P′′′→5′-ester with 6-β-D-ribofuranosylimidazo[1,2-c]pyrimidin-5(6H)-one

5′-Uridylic acid, 5′→P:5′′′→P′-dianhydride with methylenebis[phosphonic acid]

9-(5-O-Phosphono-β-L-ribofuranosyl)-9H-purin-6-amine

Hypoxanthine, 9-β-DL-ribofuranosyl-, 5′-(dihydrogen phosphate)

Hypoxanthine, 9-(2,3-O-isopropylidene-β-DL-ribofuranosyl)-