Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-thio-2′-S-[2-(trimethylsilyl)ethyl]-, 3′-methanesulfonate

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-thio-2′-S-[2-(trimethylsilyl)ethyl]uridine

2′-Deoxy-2′-[(trichloromethyl)dithio]cytidine

(2R,3R,3aR,9aR)-2,3,3a,9a-Tetrahydro-3-hydroxy-2-(hydroxymethyl)-7-methyl-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-6-one

2′-Deoxy-2′-[(4-nitrophenyl)dithio]cytidine

2′-Deoxy-2′-[(4-nitrophenyl)dithio]uridine

2′-Deoxy-2′-[(trichloromethyl)dithio]uridine

5-Methyl-2′-thio-2′-S-[2-(trimethylsilyl)ethyl]uridine

Cytidine, N-benzoyl-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-2′-thio-2′-S-[2-(trimethylsilyl)ethyl]-, 3′-methanesulfonate

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-2-propen-1-yl-N-[(7S,8R,9S,10R)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-2-propen-1-yl-N-[(7S,8R,9S,10S)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-2-propen-1-yl-N-[(7R,8S,9R,10S)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-2-propen-1-yl-N-[(7R,8S,9R,10R)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-2-propen-1-yl-N-[(7R,8S,9R,10R)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]guanosine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-2-propen-1-yl-N-[(7S,8R,9S,10R)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]guanosine

2′-Deoxy-6-O-2-propen-1-yl-N-[(7R,8S,9R,10R)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]guanosine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-2-propen-1-yl-N-[(7S,8R,9S,10S)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]guanosine

Cytidine, 2′-deoxy-, 5′-[P′-[[4-(acetyloxy)-3-carboxyphenyl]methyl] P,P′-bis(2-cyanoethyl) diphosphite]

2′-Deoxy-6-O-2-propen-1-yl-N-[(7S,8R,9S,10S)-7,8,9-tris(acetyloxy)-7,8,9,10-tetrahydrobenzo[a]pyren-10-yl]guanosine

Adenosine, 2′-deoxy-, 5′-[P′-[[4-(acetyloxy)-3-carboxyphenyl]methyl] P,P′-bis(2-cyanoethyl) diphosphite]