Uridine, 3′-deoxy-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-(hydroxyamino)-

Cytidine, N-[bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-3′-(hydroxyamino)-

Cytidine, N-[bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-2′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]amino]-

Cytidine, 3′-deoxy-2′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]amino]-

Uridine, 3′-deoxy-2′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]amino]-

Uridine, 3′-deoxy-2′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-(hydroxyimino)-

Uridine, 3′-deoxy-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-(hydroxyimino)-

Uridine, 3-(4-methylbenzoyl)-2′-O-propyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

N-[9-[5-O-(Tetrahydro-2H-pyran-2-yl)-β-D-arabinofuranosyl]-9H-purin-6-yl]benzamide

Guanosine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyluridylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-acetate

Guanosine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyluridylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-acetate

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

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[S-(phenylmethyl) methylphosphonothioate]

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

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

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-[S-(phenylmethyl) methylphosphonothioate]

Cytidine, 2′-azido-2′-deoxy-5-(3-thienyl)-, 3′,5′-dibenzoate

Cytidine, 2′-azido-2′-deoxy-5-(2-thienyl)-, 3′,5′-dibenzoate

Cytidine, 2′-chloro-2′-deoxy-5-(3-thienyl)-, 3′,5′-dibenzoate

Cytidine, 2′-chloro-2′-deoxy-5-(2-thienyl)-, 3′,5′-dibenzoate