Cytidine, N-benzoyl-2′-deoxy-, 3′-[Se-methyl [P(S)]-methylphosphonoselenoate]

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-methyl [P(S)]-methylphosphonothioate]

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-methyl [P(R)]-methylphosphonothioate]

Thymidine, 5′-O-(9-phenyl-9H-xanthen-9-yl)-, 3′-[S-methyl [P(S)]-methylphosphonothioate]

Thymidine, 5′-O-(9-phenyl-9H-xanthen-9-yl)-, 3′-[S-methyl [P(R)]-methylphosphonothioate]

4-[[1-[3,5-Bis-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]carbonyl]benzonitrile

4-[[1-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]carbonyl]benzonitrile

4-[[1-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]hydroxymethyl]benzonitrile

4-[[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]carbonyl]benzonitrile

4-[[1-(2-Deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]carbonyl]benzonitrile

Cytidine, N-acetyl-2′-O-methyl-5′-O-(9-phenyl-9H-xanthen-9-yl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, N-acetyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-methyl-, 3′-[2-cyanoethyl (R)-bis(1-methylethyl)phosphoramidite]

Cytidine, N-acetyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-methyl-, 3′-[2-cyanoethyl (S)-bis(1-methylethyl)phosphoramidite]

Uridine, 2′-O-[[[1-(2-chlorophenyl)-4-piperidinyl]oxy]methyl]-

Uridine, 2′-O-[[[1-(2-chloro-4-methylphenyl)-4-piperidinyl]oxy]methyl]-

Uridine, 2′-O-[[(tetrahydro-2H-pyran-4-yl)oxy]methyl]-

Uridine, 3-benzoyl-2′-O-[(2,6-dicarboxyphenoxy)methyl]-

Uridine, 3-benzoyl-2′-O-[1-[2-(methoxycarbonyl)phenoxy]ethyl]-