2'-O-Methyluridylyl-(3'→5')-P-deoxy-P-methyl-2'-O-methyluridylyl-(3'→5')-2'-O-methylcytidine

(2R,3R,3aR,10aS)-6,8-Dichloro-2,3,3a,10a-tetrahydro-3-hydroxyfuro[2',3':4,5]oxazolo[3,2-a]benzimidazole-2-methanol

2'-O-Methyl-P-thioguanylyl-(3'→5')-2'-C-methylcytidine

2'-O-Methyladenylyl-(3'→5')-2'-C-methylcytidine

1-[(1R,3R,4S,5R)-4-(Acetyloxy)-3-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-6-(2-phenoxyacetyl)-2-oxa-6-azabicyclo[3.2.0]hept-1-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(2R,3R,3aR,7aR)-3-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]hexahydro-3a-hydroxy-5-oxo-2H-furo[2,3-c]pyran-2-yl]-3-(hydroxymethyl)-2,4(1H,3H)-pyrimidinedione

Carbonic acid, [(2R,5S)-5-(4-amino-5-fluoro-2-oxo-1(2H)-pyrimidinyl)tetrahydro-2-furanyl]methyl [(2R,5R)-5-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-ethynyl-2,5-dihydro-2-furanyl]methyl ester

Phosphoric acid, mono[[(2R,5R)-5-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-ethynyl-2,5-dihydro-2-furanyl]methyl] mono[[(2R,5S)-5-(1,6-dihydro-6-oxo-9H-purin-9-yl)tetrahydro-2-furanyl]methyl] ester

5-Methyl-1-[(2R,4S)-tetrahydro-4-hydroxy-5,5-bis[(triphenylmethoxy)methyl]-2-furanyl]-2,4(1H,3H)-pyrimidinedione

2,4(1H,3H)-Pyrimidinedione, 1-[(5S,6R,8R,9R)-9-hydroxy-6-(hydroxymethyl)-2,2-dioxido-4-oxo-1,7-dioxa-2-thiaspiro[4.4]non-8-yl]-5-methyl-

Phosphoric acid, mono[[(2R,5S)-5-(4-amino-2-oxo-1(2H)-pyrimidinyl)tetrahydro-2-furanyl]methyl] mono[[(2R,5R)-5-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-ethynyl-2,5-dihydro-2-furanyl]methyl] ester

Phosphoric acid, mono[[(2R,5S)-5-(6-amino-9H-purin-9-yl)tetrahydro-2-furanyl]methyl] mono[[(2R,5R)-5-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-ethynyl-2,5-dihydro-2-furanyl]methyl] ester

1-[(2R,5S)-5-(Difluoromethyl)tetrahydro-5-(hydroxymethyl)-2-furanyl]-5-fluorodihydro-2,4(1H,3H)-pyrimidinedione

3,4-Dihydro-1-(2,3,5-tri-O-benzoyl-β-D-lyxofuranosyl)-4-[2-(trimethylsilyl)ethynyl]-2(1H)-pyrimidinone

1-[(2R,4S,5R)-4,5-Bis(acetyloxy)tetrahydro-5-[2-(triethylsilyl)ethynyl]-2-furanyl]-2,4(1H,3H)-pyrimidinedione

Brivudine Impurity

2,4(1H,3H)-Pyrimidinedione, 1-[[(6R,8S,9R)-8-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-7,8,9,10-tetrahydro-3-methyl-2-oxo-6,9-epoxy-2H,6H-pyrimido[2,1-b][1,3]oxazocin-9-yl]methyl]-5-methyl-

1-[2-Deoxy-5-O-(triphenylmethyl)-β-D-threo-pentofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

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

5-Methyl-1-[(2R,3aR,6R,6aR)-3,3a,6,6a-tetrahydro-3a,6-dihydroxy-2H-cyclopenta[b]furan-2-yl]-2,4(1H,3H)-pyrimidinedione