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

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

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

L-Valine, N-[(1,1-dimethylethoxy)carbonyl]-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

5-[3-[(9-Anthracenylcarbonyl)amino]-1-propyn-1-yl]-2'-deoxyuridine

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

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

Sofosbuvir Impurity

5'-O-DMT-uridine 3'-CE phosphoramidite

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

9-[2,3-Dideoxy-2-(dimethylamino)-5-O-[(4-methoxyphenyl)diphenylmethyl]-3-[(4-methylphenyl)sulfonyl]-β-D-xylofuranosyl]-9H-purin-6-amine

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

Uridine, 5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-5-[2,2'-bithiophen]-5-yl-, 3'-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

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