5'-[[2-[[5-(4-Amino-1-naphthalenyl)-1,3,4-oxadiazol-2-yl]amino]-2-oxoethyl]amino]-8-chloro-5'-deoxy-2-methyladenosine

5'-[[2-[[5-(5-Amino-1-naphthalenyl)-1,3,4-oxadiazol-2-yl]amino]-2-oxoethyl]amino]-5'-deoxy-8-fluoro-2-methyladenosine

2',3'-O-(Dibutylstannylidene)-5-methylcytidine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-5-[[[3-(dimethylamino)propyl]amino]carbonyl]-2'-fluorouridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-2'-fluoro-5-iodouridine

5'-[[2-[[5-(5-Amino-1-naphthalenyl)-1,3,4-oxadiazol-2-yl]amino]-2-oxoethyl]amino]-5'-deoxy-2-methyladenosine

3'-O-[6-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methyluridine

2'-O-[6-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methylcytidine

2'-O-[6-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methyluridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-O-[6-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methyluridine

3'-O-[6-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methylcytidine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-O-[6-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methylcytidine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-O-[6-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methyluridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-O-[6-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)hexyl]-5-methylcytidine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-O-[2-[2-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)ethoxy]ethyl]-5-methyluridine

2'-O-[2-[2-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)ethoxy]ethyl]-5-methylcytidine

2'-O-[2-[2-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)ethoxy]ethyl]-5-methyluridine

3'-O-(6-Aminohexyl)-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-5-methylcytidine

2'-O-(6-Aminohexyl)-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-5-methylcytidine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-O-[2-[2-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)ethoxy]ethyl]-5-methylcytidine