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

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

1-β-D-Arabinofuranosyl-6-azido-5-fluoro-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

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

1-(5-O-Acetyl-α-D-arabinofuranosyl)-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(2R,4S,5R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-5-ethynyltetrahydro-2-furanyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

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

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

5-Methyl-1-[5-O-(1-oxopropyl)-β-D-xylofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-(5-O-Acetyl-β-D-xylofuranosyl)-5-methyl-2,4(1H,3H)-pyrimidinedione