Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, N-[(cyclopentyloxy)hydroxyphosphinyl]-, 5′-[hydrogen [(2S)-2,3-dihydroxy-1-oxopropyl]phosphoramidate]

1-[2-Deoxy-3-C-(hydroxymethyl)-D-erythro-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

4-Amino-1-[2-deoxy-3-C-(hydroxymethyl)-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

1-[2-Deoxy-3-C-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-D-erythro-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

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

Thymidine, 3′-C-[(acetyloxy)methyl]-, 3′-acetate 5′-[1,1′-biphenyl]-4-carboxylate

Cytidine, 3′-C-[(acetyloxy)methyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-acetate 5′-[1,1′-biphenyl]-4-carboxylate

Thymidine, 3′-C-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-, 3′-acetate 5′-[1,1′-biphenyl]-4-carboxylate

Cytidine, 2′-deoxy-3′-C-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-N-(2-methyl-1-oxopropyl)-, 3′-acetate 5′-[1,1′-biphenyl]-4-carboxylate

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-(O,O-dimethyl phosphorothioate)

Guanine, 9-(2-deoxy-α-D-erythro-pentofuranosyl)-N-methyl-

9H-Purine, 2-amino-6-(benzyloxy)-9-(2-deoxy-α-D-erythro-pentofuranosyl)-

Thymidine, 3′-(β-methyl-2-nitrobenzeneethanesulfonate)

Thymidine, 3′,5′-bis(β-methyl-2-nitrobenzeneethanesulfonate)

Thymidine, 5′-(β-methyl-2-nitrobenzeneethanesulfonate)

Guanosine, 2′-deoxy-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-6-O-[2-(4-nitrophenyl)ethyl]-, 5′-(2,4-dinitrobenzeneethanesulfonate)

Guanosine, 2′-deoxy-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-6-O-[2-(4-nitrophenyl)ethyl]-, 3′,5′-bis(2,4-dinitrobenzeneethanesulfonate)

Cytidine, 2′-deoxy-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-, 3′,5′-bis(4-chloro-2-nitrobenzeneethanesulfonate)

Cytidine, 2′-deoxy-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-, 3′-(4-chloro-2-nitrobenzeneethanesulfonate)