5′-Adenylic acid, 8-bromo-, cyclic 2′,3′-sulfite

5′-Adenylic acid, cyclic 2′,3′-sulfite

5′-Adenylic acid, 8-fluoro-

7,8-Dihydro-8-thioxo-5′-guanylic acid

Thymidine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]-P(S)-phenyl-P-thiothymidylyl-(3′→5′)-P(S)-phenyl-P-thiothymidylyl-(3′→5′)-

Thymidine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]-, 3′-(S-phenyl hydrogen phosphorothioate)

Thymidine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]-, 3′-(hydrogen phosphonate)

Uridine, cyclic 3′,5′-(phenylmethyl phosphate) 2′-(2,2-dimethylpropanoate)

Uridine, cyclic 3′,5′-(phenylmethyl phosphate) 2′-acetate

Uridine, cyclic 3′,5′-(phenylmethyl phosphate)

Uridine, cyclic 3′,5′-(ethyl phosphate)

5′-Uridylic acid, 2′,3′-O-(1-methylethylidene)-, bis[(2-nitrophenyl)methyl] ester

5′-Thymidylic acid, bis[(2-nitrophenyl)methyl] ester, 3′-acetate

Guanosine, N-benzoyl-2′,3′-O-(1,2-dimethoxyethylidene)-

Uridine, cyclic 3′,5′-(hydrogen phosphate) 2′-(2,2-dimethylpropanoate)

Adenosine, 2′,3′-O-(1,2-dimethoxyethylidene)-N-(4-methoxybenzoyl)-

Adenosine, 2′,3′-O-(methoxyphenylmethylene)-

Cytidine, 2′,3′-O-(1,2-dimethoxyethylidene)-N-(4-methoxybenzoyl)-

Uridine, 2′,3′-O-(1,2-dimethoxyethylidene)-

Guanosine, N-benzoyl-2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-, 3′-(methoxyacetate)