(2'R)-2'-Deoxy-2',5-difluoro-3',5'-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-2'-[2-(trimethylsilyl)ethynyl]uridine

Bis[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl] (2'R)-2'-deoxy-2'-ethynyl-2',5-difluoro-5'-uridylate

1-(2-Deoxy-2-fluoro-β-D-arabinofuranosyl)-5-(4-fluorobutyl)-2,4(1H,3H)-pyrimidinedione

3-Benzoyl-1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-(5-fluoropentyl)-2,4(1H,3H)-pyrimidinedione

1-[2-Deoxy-3,5-bis-O-[tris(1-methylethyl)silyl]-β-D-erythro-pentofuranosyl]-5-[2-(trimethylsilyl)ethynyl]-1H-imidazole-4-carbonitrile

1-[2-Deoxy-5-O-(triphenylmethyl)-β-D-threo-pentofuranosyl]-5-(1-propyn-1-yl)-2,4(1H,3H)-pyrimidinedione

1-(2-Deoxy-2,2-difluoro-D-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

5-Chloro-2'-deoxy-N-methylcytidine

6-Amino-1-β-D-arabinofuranosyl-5-fluoro-2,4(1H,3H)-pyrimidinedione

6-Azido-1-[(2R,5S)-3,3-difluorotetrahydro-5-[(phosphonooxy)methyl]-2-furanyl]-5-fluoro-2,4(1H,3H)-pyrimidinedione

6-Azido-1-[(2R,5S)-3,3-difluorotetrahydro-5-(hydroxymethyl)-2-furanyl]-5-fluoro-2,4(1H,3H)-pyrimidinedione

1-(2,3-Dideoxy-2,3-difluoro-β-D-xylofuranosyl)-2,4(1H,3H)-pyrimidinedione

6-Amino-5-fluoro-1-(5-O-phosphono-β-D-arabinofuranosyl)-2,4(1H,3H)-pyrimidinedione

6-Amino-1-[(2R,5S)-3,3-difluorotetrahydro-5-(hydroxymethyl)-2-furanyl]-5-fluoro-2,4(1H,3H)-pyrimidinedione

6-Azido-5-fluoro-1-(5-O-phosphono-β-D-arabinofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-β-D-Arabinofuranosyl-6-azido-5-fluoro-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)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-(5-O-Benzoyl-α-D-arabinofuranosyl)-5-methyl-2,4(1H,3H)-pyrimidinedione

5-Methyl-1-[5-O-(1-oxopentyl)-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

5-Methyl-1-[5-O-(1-oxobutyl)-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione