3-Benzoyl-1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-[4-[(methylsulfonyl)oxy]butyl]-2,4(1H,3H)-pyrimidinedione

2',3'-Dideoxy-3'-methylguanosine

3-Benzoyl-1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-[5-[(methylsulfonyl)oxy]pentyl]-2,4(1H,3H)-pyrimidinedione

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-2-[2-([2,2':6',2''-terpyridin]-4'-yloxy)ethyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-Deoxy-2-[2-([2,2':6',2''-terpyridin]-4'-yloxy)ethyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[3,5-Bis-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-2-(2-ethoxy-2-oxoethyl)-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

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

3'-C-Ethynyl-5'-adenylic acid

2-Chloro-1-(2,3,5-tri-O-benzoyl-2-C-methyl-β-D-ribofuranosyl)-1H-benzimidazole

2-Azido-1-(2,3,5-tri-O-benzoyl-2-C-methyl-β-D-ribofuranosyl)-1H-benzimidazole

5'-O-(Methoxymethyl)-2',3'-O-(1-methylethylidene)-6-[2-(trimethylsilyl)ethynyl]uridine

Uridine, 6-ethynyl-5'-O-(methoxymethyl)-2',3'-O-(1-methylethylidene)-

5'-O-(Methoxymethyl)-2',3'-O-(1-methylethylidene)-6-(2-phenylethynyl)uridine

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

Uridine, 6-(phenylethynyl)-

2,4(1H,3H)-Pyrimidinedione, 1-[(6R,8R,9R)-4-amino-9-(1,1-dimethylbutoxy)-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-

1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Uridine, 2'-deoxy-6-ethynyl-

Uridine, 2'-deoxy-3',5'-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-6-[(trimethylsilyl)ethynyl]-

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