4-Amino-1-[(2R,4R,5R)-4-chloro-5-(chloromethyl)-3,3-difluorotetrahydro-2-furanyl]-2(1H)-pyrimidinone

2′-Deoxy-N-[[[5-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)pentyl]oxy]carbonyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2′,2′-difluorocytidine

Cytidine, 2′-deoxy-2′,2′-difluoro-, 5′-[2-[[2-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)ethyl]dithio]ethyl carbonate]

Cytidine, 2′-deoxy-2′,2′-difluoro-, 5′-[5-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)pentyl carbonate]

2′-Deoxy-N-[[2-[[2-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)ethyl]dithio]ethoxy]carbonyl]-2′,2′-difluorocytidine

2′-Deoxy-2′,2′-difluoro-N-[[[5-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)pentyl]oxy]carbonyl]cytidine

4-(Methylthio)-8-β-D-ribofuranosyl-8H-thieno[3′,4′:4,5]pyrrolo[2,3-d]pyrimidine

4-Methoxy-8-β-D-ribofuranosyl-8H-thieno[3′,4′:4,5]pyrrolo[2,3-d]pyrimidine

4-Methyl-8-β-D-ribofuranosyl-8H-thieno[3′,4′:4,5]pyrrolo[2,3-d]pyrimidine

4-Chloro-8-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-8H-thieno[3′,4′:4,5]pyrrolo[2,3-d]pyrimidine

2,4,6,10-Tetraoxa-5-phosphahexacosanoic acid, 5-[[1-[(2S,3R,4R,5R)-5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-4-fluorotetrahydro-3-hydroxy-4-methyl-2-furanyl]cyclopropyl]oxy]-8-methyl-, 1-methylethyl ester, 5-oxide

1-[(2S,3R,4R,5R)-5-(3,4-Dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-4-fluorotetrahydro-3-hydroxy-4-methyl-2-furanyl]cyclopropyl 3-(hexadecyloxy)-2-methylpropyl hydrogen phosphate

2,4,6,10-Tetraoxa-5-phosphaoctacosanoic acid, 5-[[1-[(2S,3R,4R,5R)-5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-4-fluorotetrahydro-3-hydroxy-4-methyl-2-furanyl]cyclopropyl]oxy]-8-methyl-, 1-methylethyl ester, 5-oxide