Thymidine, 5′-O-[(1,1-dimethylethyl)diphenylsilyl]-, 3′-(1H-imidazole-1-carbothioate)

3′-Deoxy-3′-(3-methoxy-3-oxopropyl)thymidine

Thymidine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(S-methyl carbonodithioate)

Thymidylyl-(3′→5′)-thymidylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-O-methyluridylyl-(3′→3′)-uridylyl-(5′→3′)-thymidylyl-(5′→3′)-thymidylyl-(5′→3′)-thymidine

P(O)-[3-[(Hydroxymercaptophosphinyl)oxy]propyl]-P-thiothymidylyl-(3′→5′)-thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-[4-[(1,4-dioxopentyl)oxy]butyl]-P-thiothymidylyl-(3′→5′)-thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-[3-[(1,4-dioxopentyl)oxy]propyl]-P-thiothymidylyl-(3′→5′)-thymidine

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[4-[(1,4-dioxopentyl)oxy]butyl N,N-bis(1-methylethyl)phosphoramidite]

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[4-[(1,4-dioxopentyl)oxy]butyl N,N-bis(1-methylethyl)phosphoramidite]

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-[3-[(1,4-dioxopentyl)oxy]propyl N,N-bis(1-methylethyl)phosphoramidite]

P(O)-(4-Hydroxybutyl)-P-thiothymidylyl-(3′→5′)-thymidine

P(O)-(3-Hydroxypropyl)-P-thiothymidylyl-(3′→5′)-thymidine

7-[3,5-O-[[[[[(2-Chlorophenyl)methoxy]carbonyl]oxy]methoxy]phosphinylidene]-2-C-methyl-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

Cytidine, 2′-C-methyl-, cyclic 3′,5′-[[[[(2-chlorophenyl)methoxy]carbonyl]oxy]methyl phosphate]

Uridine, 2′-C-methyl-, cyclic 3′,5′-[[[[(2-chlorophenyl)methoxy]carbonyl]oxy]methyl phosphate]

Inosine, 2′-C-methyl-, cyclic 3′,5′-[[[[(2-chlorophenyl)methoxy]carbonyl]oxy]methyl phosphate]

Adenosine, 2′-C-methyl-, cyclic 3′,5′-[[[[(2-chlorophenyl)methoxy]carbonyl]oxy]methyl phosphate]

Inosine, 2′-C-methyl-, 2-(methylsulfonyl)hydrazone, cyclic 3′,5′-[[[[(2-chlorophenyl)methoxy]carbonyl]oxy]methyl phosphate]

Methanesulfonic acid 2-[9-[3,5-O-[[[[[(2-chlorophenyl)methoxy]carbonyl]oxy]methoxy]phosphinylidene]-2-C-methyl-β-D-ribofuranosyl]-9H-purin-6-yl]-2-methylhydrazide

9-[3,5-O-[[[[[(2-Chlorophenyl)methoxy]carbonyl]oxy]methoxy]phosphinylidene]-2-C-methyl-β-D-ribofuranosyl]-9H-purin-2-amine