Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3-[4-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]butyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3-[2-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]ethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3-[7-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]heptyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-[4-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]butyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3-[2-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]ethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3-[7-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-(phenoxyacetyl)-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]heptyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3-[4-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-(phenoxyacetyl)-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]butyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3-[2-[3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-(phenoxyacetyl)-β-D-erythro-pentofuranosyl]-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]ethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-(7-iodoheptyl)-

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

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-(2-iodoethyl)thymidine

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[7-[(phenoxyacetyl)oxy]heptyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[4-[(phenoxyacetyl)oxy]butyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[2-[(phenoxyacetyl)oxy]ethyl]-

6-Chloro-9-[2-O-[(4-methylphenyl)sulfonyl]-β-D-ribofuranosyl]-9H-purin-2-amine

Adenosine, 2-amino-, 3′,5′-diacetate 2′-(4-methylbenzenesulfonate)

6-Chloro-9-[3,5-di-O-acetyl-2-O-[(4-methylphenyl)sulfonyl]-β-D-ribofuranosyl]-9H-purin-2-amine

Inosine, 3′,5′-diacetate 2′-(4-methylbenzenesulfonate)

Guanosine, 3′,5′-diacetate 2′-(4-methylbenzenesulfonate)

Adenosine, 3′,5′-diacetate 2′-(4-methylbenzenesulfonate)