1-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-hydroxy-5-(3-perylenylcarbonyl)-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

[[(2S,5R)-5-[4-Amino-2-oxo-5-[2-[4-[2-[(2,2,2-trifluoroacetyl)amino]ethoxy]phenyl]ethynyl]-1(2H)-pyrimidinyl]tetrahydro-2-furanyl]methoxy]hydroxyphosphinyl 1H-imidazole-1-carboxylate

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

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

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

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

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

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

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

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

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

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