Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-(2-sulfido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl)-

Cytidine, 2′-deoxyadenylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-[P(S)]-2′-deoxy-P-selenocytidylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxy-

Adenosine, [P(S)]-P-selenothymidylyl-(3′→5′)-[P(S)]-2′-deoxy-P-selenocytidylyl-(3′→5′)-[P(S)]-P-selenothymidylyl-(3′→5′)-[P(S)]-2′-deoxy-P-selenocytidylyl-(3′→5′)-[P(S)]-2′-deoxy-P-selenoguanylyl-(3′→5′)-2′-deoxy-

Adenosine, [P(R)]-P-selenothymidylyl-(3′→5′)-[P(R)]-2′-deoxy-P-selenocytidylyl-(3′→5′)-[P(R)]-P-selenothymidylyl-(3′→5′)-[P(R)]-2′-deoxy-P-selenocytidylyl-(3′→5′)-[P(R)]-2′-deoxy-P-selenoguanylyl-(3′→5′)-2′-deoxy-

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-3′-O-[(2S)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-, 6-(diphenylcarbamate)

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-3′-O-[(2R)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-, 6-(diphenylcarbamate)

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(2S)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(2R)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2R)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2R)-2-selenido-3-oxa-1-thia-2-phosphaspiro[4.5]dec-2-yl]-

Guanosine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-propyl-

Guanosine, 2′-deoxy-N-[2-(dimethylamino)ethyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-methyl-

Inosine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2-[4-(4-nitrophenyl)-1-piperazinyl]-

Inosine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)-

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

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

Inosine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2-(4-morpholinyl)-

Xanthosine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-6-O-(phenylmethyl)-, 2-(4-methylbenzenesulfonate)