1-[2-O-Acetyl-3,7-anhydro-5-deoxy-6,8-di-O-[(1,1-dimethylethyl)dimethylsilyl]-5-[[(phenylmethoxy)carbonyl]amino]-D-threo-β-D-allo-octofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[3,7-Anhydro-5-deoxy-6,8-di-O-[(1,1-dimethylethyl)dimethylsilyl]-5-[[(phenylmethoxy)carbonyl]amino]-D-threo-β-D-allo-octofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

4-Chloro-7-(2-C-ethynyl-β-D-ribofuranosyl)-5-fluoro-7H-pyrrolo[2,3-d]pyrimidine

7-[3,5-Bis-O-[(2,4-dichlorophenyl)methyl]-2-C-ethynyl-β-D-ribofuranosyl]-4-chloro-7H-pyrrolo[2,3-d]pyrimidine

5-Ethynyl-7-(2-C-ethynyl-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-(2-C-Ethynyl-β-D-ribofuranosyl)-5-iodo-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-(2-C-Ethynyl-β-D-ribofuranosyl)-5-iodo-4-methoxy-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-(2-C-ethynyl-β-D-ribofuranosyl)-5-iodo-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[2-C-ethynyl-3,5-bis-O-(4-methylbenzoyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

2,4(1H,3H)-Pyrimidinedione, 1-[2-O-[3-hydroxy-1,1,3,3-tetrakis(1-methylethyl)disiloxanyl]-β-D-arabinofuranosyl]-

1-[3,5-O-[1,1,3,3-Tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

2,4(1H,3H)-Pyrimidinedione, 1-[2,3-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-

2,4(1H,3H)-Pyrimidinedione, 1-[5-O-[bis(1-methoxyphenyl)phenylmethyl]-2,3-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-

2,4(1H,3H)-Pyrimidinedione, 1-[2-O-[3-hydroxy-1,1,3,3-tetrakis(1-methylethyl)disiloxanyl]-3,5-bis-O-[[(trichloroacetyl)amino]carbonyl]-β-D-arabinofuranosyl]-

1-[3-Deoxy-3-[(4-methoxyphenyl)amino]-β-D-lyxofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[3-Deoxy-3-(phenylamino)-β-D-lyxofuranosyl]-2,4(1H,3H)-pyrimidinedione

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

1-[5-O-Benzoyl-6-deoxy-3-O-(2-naphthalenylmethyl)-β-D-allofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-O-Acetyl-5-O-benzoyl-6-deoxy-3-O-(2-naphthalenylmethyl)-β-D-allofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-(2-Deoxy-β-D-threo-pentofuranosyl)-5-(methoxymethyl)-2,4(1H,3H)-pyrimidinedione