Thymidine, 5′-amino-P-(2-cyanoethyl)-5′-deoxythymidylyl-(3′→5′)-P-(2-cyanoethyl)thymidylyl-(3′→5′)-P-(2-cyanoethyl)thymidylyl-(3′→5′)-P-(2-cyanoethyl)thymidylyl-(3′→5′)-P-(2-cyanoethyl)thymidylyl-(3′→5′)-P-(2-cyanoethyl)thymidylyl-(3′→5′)-P-(2-cyanoethyl)thymidylyl-(3′→5′)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxy-P-[[3-(dimethylamino)propyl]amino]thymidylyl-(3′→5′)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(S)-2-pyridinyl-P-thiothymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

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

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P-thiothymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxy-P-[[3-(dimethylamino)propyl]amino]-2′-O-methyluridylyl-(3′→5′)-2′-O-methyl-

Thymidine, (S)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxy-P-[[3-(dimethylamino)propyl]amino]thymidylyl-(3′→5′)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Thymidine, (R)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxy-P-[[3-(dimethylamino)propyl]amino]thymidylyl-(3′→5′)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

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

Thymidylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-thymidine

Carbamic acid, [1,2-dihydro-1-[(2R,3aR,8aS)-hexahydro-6-oxido-6-phenoxyfuro[2,3-e][1,3,2]dioxaphosphepin-2-yl]-2-oxo-4-pyrimidinyl]-, 2-(4-nitrophenyl)ethyl ester

Carbamic acid, [1-[2,3-dideoxy-3-(hydroxymethyl)-α-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-, 2-(4-nitrophenyl)ethyl ester

Carbamic acid, [1-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-α-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-, 2-(4-nitrophenyl)ethyl ester

4-Amino-1-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[(2R,3aR,8aS)-hexahydro-6-oxido-6-phenoxyfuro[2,3-e][1,3,2]dioxaphosphepin-2-yl]-2(1H)-pyrimidinone

Carbamic acid, [1,2-dihydro-1-[(2S,3aR,8aS)-hexahydro-6-oxido-6-phenoxyfuro[2,3-e][1,3,2]dioxaphosphepin-2-yl]-2-oxo-4-pyrimidinyl]-, 2-(4-nitrophenyl)ethyl ester

Cytidine, 2′,3′-dideoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-

4-Amino-1-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[[(diphenoxyphosphinyl)oxy]methyl]-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[3-[(benzoyloxy)methyl]-2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

1-(5-Amino-2,5-dideoxy-3-O-ethyl-2-fluoro-β-D-arabinofuranosyl)-5-ethyl-2,4(1H,3H)-pyrimidinedione