1-Benzyl-5-methyl-1H -pyrazol-3-ylamine

1-[(2S,3aS,4S,6S,6aS)-6-[(Benzoyloxy)methyl]tetrahydro-2-oxidofuro[3,4-d]-1,3,2-dioxathiol-4-yl]-2,4(1H,3H)-pyrimidinedione

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

5-[(1E)-2-Bromoethenyl]-1-[3-chloro-5-O-(4-chlorobenzoyl)-2,3-dideoxy-β-D-threo-pentofuranosyl]-2,4(1H,3H)-pyrimidinedione

L-Valine, N-[(1,1-dimethylethoxy)carbonyl]-L-valyl-, 5'-ester with 5-[(1E)-2-bromoethenyl]-3'-chloro-2',3'-dideoxyuridine

L-Valine, N-[(1,1-dimethylethoxy)carbonyl]-, 5'-ester with 5-[(1E)-2-bromoethenyl]-3'-chloro-2',3'-dideoxyuridine

L-Valine, L-valyl-, 5'-ester with 3'-azido-5-[(1E)-2-bromoethenyl]-2',3'-dideoxyuridine

5'-Bromo-5-[(1E)-2-bromoethenyl]-5'-deoxyuridine

1-[5-O-Benzoyl-2-deoxy-3-O-(methylsulfonyl)-β-D-threo-pentofuranosyl]-5-[(1E)-2-bromoethenyl]-2,4(1H,3H)-pyrimidinedione

5-[(1E)-2-Bromoethenyl]-1-[(2R,4S,5R)-4-bromotetrahydro-5-methyl-2-furanyl]-2,4(1H,3H)-pyrimidinedione

2'-Uridylic acid, 5'-O-(9-phenyl-9H-xanthen-9-yl)-3'-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-, mono(2-chlorophenyl) ester

1-[(2R,5S)-5-(1,3-Diphenyl-2-imidazolidinyl)tetrahydro-2-furanyl]-2,4(1H,3H)-pyrimidinedione

2,4(1H,3H)-Pyrimidinedione, 5-bromo-1-[2-deoxy-2-(2-ethoxy-2-oxoethyl)-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-

7-(2-Deoxy-4-C-ethynyl-2-fluoro-β-D-arabinofuranosyl)-5-fluoro-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one

4-Amino-7-(2-deoxy-4-C-ethynyl-2-fluoro-β-D-arabinofuranosyl)-5-fluoro-1,7-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

2-Amino-9-(2-deoxy-4-C-ethynyl-2-fluoro-β-D-arabinofuranosyl)-1,9-dihydro-6H-purin-6-one

9-(2-Deoxy-4-C-ethynyl-2-fluoro-β-D-arabinofuranosyl)-2-fluoro-1,9-dihydro-6H-purin-6-one

2,4(1H,3H)-Pyrimidinedione, 1-[(2R,4S,5R)-5-[2-[[[(2R,3S,5R)-2-[2-[bis(4-methoxyphenyl)phenylmethoxy]ethyl]-5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-3-furanyl]methyl]thio]ethyl]tetrahydro-4-[[(phenylmethyl)thio]methyl]-2-furanyl]-

1-[(2R,3S,3aS,6aS)-3-Fluorohexahydrofuro[3,4-b]furan-2-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-methyl-β-D-arabinofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

Thymidine, 5'-O-[bis(4-methoxyphenyl)phenylmethyl]-3'-O-[methyl[[6-(trifluoromethyl)-1H-benzotriazol-1-yl]oxy]phosphinothioyl]-