Guanosine, 5′-O-[(4-aminobutoxy)mercaptophosphinyl]-2′-deoxy-P-thioguanylyl-(3′→5′)-2′-deoxy-P-thioguanylyl-(3′→5′)-2′-deoxy-

Cytidine, 5′-O-[(4-aminobutoxy)mercaptophosphinyl]-2′-deoxy-P-thiocytidylyl-(3′→5′)-2′-deoxy-P-thiocytidylyl-(3′→5′)-2′-deoxy-

Thymidine, 5′-O-[(4-aminobutoxy)mercaptophosphinyl]-P-thiothymidylyl-(3′→5′)-P-thiothymidylyl-(3′→5′)-

Thymidine, 3′-amino-3′-deoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidylyl-(3′→5′)-3′-O-[bis(4-methoxyphenyl)phenylmethyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,P-dithiothymidylyl-(3′→5′)-5′-amino-5′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-thiothymidylyl-(3′→5′)-5′-amino-5′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′)-5′-amino-5′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 3′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 5′-(hydrogen pyridiniophosphonate), inner salt

Uridine 5′-(tetrahydrogen triphosphate), 5-[[[2-(1H-imidazol-4-yl)ethyl]amino]carbonyl]-2′,3′-O-(1-methylethylidene)-

Uridine 5′-(tetrahydrogen triphosphate), 2′,3′-O-(1-methylethylidene)-5-[[(4-pyridinylmethyl)amino]carbonyl]-

Guanosine, 8-[[(1,1-dimethylethyl)amino]carbonyl]-, 2′,3′,5′-triacetate

Adenosine, 8-(4-pyridinylcarbonyl)-

Adenosine, 8-(4-pyridinylcarbonyl)-, 2′,3′,5′-triacetate

N-[6,9-Dihydro-9-[4-C-(1-hydroxycyclopropyl)-2-O-(methylsulfonyl)-3,5-bis-O-(phenylmethyl)-β-D-arabinofuranosyl]-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[9-[4-C-[1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]cyclopropyl]-2-O-(methylsulfonyl)-3,5-bis-O-(phenylmethyl)-β-D-arabinofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

4′-C-[1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]cyclopropyl]-N-(2-methyl-1-oxopropyl)-3′,5′-bis-O-(phenylmethyl)guanosine

N-[9-[4-C-[1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]cyclopropyl]-3,5-bis-O-(phenylmethyl)-β-D-arabinofuranosyl]-9H-purin-6-yl]benzamide

N-[9-[4-C-[1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]cyclopropyl]-3,5-bis-O-(phenylmethyl)-β-D-arabinofuranosyl]-8,9-dihydro-7H-purin-6-yl]benzamide