Cytidine, N-acetyl-5-[1,2-bis(acetyloxy)ethyl]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

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

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

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

5′-Guanylic acid, monoanhydride with methylphosphonic acid

Guanosine 5′-(trihydrogen diphosphate), P′-(2-aminoethyl) ester

Guanosine 5′-(trihydrogen diphosphate), P′-[[(2R,3R,4R,5S)-3,4-dihydroxy-5-methyl-2-pyrrolidinyl]methyl] ester

Methyl 3-[1,2,3,6-tetrahydro-4-methyl-2,6-dioxo-1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-5-pyrimidinyl]-2-propenoate

Uridine, 5′-[[(2R,3R,4R,5S)-3,4-bis(phenylmethoxy)-1-(phenylmethyl)-5-[(phenylmethoxy)methyl]-2-pyrrolidinyl]methyl propanedioate]

Thymidine, P-thiothymidylyl-(3′-5′→5′)-

Thymidine, thymidylyl-(3′-5′→5′)-

Thymidine, P(O)-methyl-P-thiothymidylyl-(3′→5′)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(Se)-methyl-P-seleno-P-thiothymidylyl-(3′→5′)-3′-O-[bis(4-methoxyphenyl)phenylmethyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-selenothymidylyl-(3′→5′)-, 3-acetate

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2,2-dioxido-6-(1-piperazinylmethyl)-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2,2-dioxido-6-[[4-(phenylmethyl)-1-piperazinyl]methyl]-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[(4-methyl-1-piperazinyl)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6S,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2,2-dioxido-6-[(phenylthio)methyl]-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

Phenylmethyl 2-[[(5R,6R,8R,9R)-4-amino-8-(3,4-dihydro-3,5-dimethyl-2,4-dioxo-1(2H)-pyrimidinyl)-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-6-yl]methoxy]acetate

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[(4-methylphenyl)methoxy]methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione