1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[3-[[(1,1-dimethylethoxy)carbonyl]amino]propyl]-β-D-ribofuranosyl]-4,6-difluoro-1H-benzimidazole

4,6-Difluoro-1-[2-O-[3-[[(1,1-dimethylethoxy)carbonyl]amino]propyl]-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-ribofuranosyl]-1H-benzimidazole

5-[3-[2-[2-(2-Azidoethoxy)ethoxy]ethoxy]-1-propyn-1-yl]-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

2'-[[[[1-(Acetyloxy)-2,2,6,6-tetramethyl-4-piperidinyl]amino]carbonyl]amino]-2'-deoxyuridine

5-[(1E)-3-Amino-3-oxo-1-propen-1-yl]-2'-deoxyuridine

Guanosine 5'-(trihydrogen diphosphate), P'→P'-anhydride with 7-methylguanosine 5'-[hydrogen P-(phosphonomethyl)phosphonate] inner salt

5-(6-Chloro-2-benzothiazolyl)-2'-deoxyuridine

5-[3-[[[3',6'-Bis[[(1,1-dimethylethoxy)carbonyl]oxy]-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-6-yl]carbonyl]amino]propyl]-3'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

(3'R)-3'-Deoxy-3'-fluoro-3'-methylcytidine

5-(3-Aminopropyl)-3'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

5'-S-[[Bis(1-methylethoxy)phosphinyl]methyl]-5'-thioadenosine

5'-S-[[Bis(1-methylethoxy)phosphinyl]methyl]-5'-thioguanosine

N-Benzoyl-5'-S-[[bis(1-methylethoxy)phosphinyl]methyl]-5'-thioadenosine

5-[3-(3-Aminopropoxy)-1-propyn-1-yl]-2',3'-dideoxyuridine 5'-(tetrahydrogen triphosphate)

5-[3-(3-Aminopropoxy)-1-propyn-1-yl]-2',3'-dideoxycytidine

5-[3-(3-Aminopropoxy)-1-propyn-1-yl]-2',3'-dideoxyuridine

5-[3-(3-Aminopropoxy)-1-propyn-1-yl]-2'-deoxyuridine

5-[3-(3-Aminopropoxy)-1-propyn-1-yl]-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

5-(3-Amino-1-propyn-1-yl)-2',3'-dideoxyuridine 5'-(tetrahydrogen triphosphate)

5-(3-Amino-1-propyn-1-yl)-2',3'-dideoxycytidine 5'-(tetrahydrogen triphosphate)