2'-Chloro-2'-deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4'-C-ethynyluridine

2-Amino-4'-C-(chloromethyl)-2'-deoxy-2'-fluoroadenosine

5'-O-[(1S)-1-(Carboxymethyl)-2-ethoxy-2-oxo-1-phosphonoethyl]-2-fluoroadenosine

5'-O-[(1R)-1-(Carboxymethyl)-2-ethoxy-2-oxo-1-phosphonoethyl]-2-fluoroadenosine

5'-O-[(1R)-2-Ethoxy-2-oxo-1-phosphonoethyl]-2-fluoroadenosine

5'-O-[(1S)-2-Ethoxy-2-oxo-1-phosphonoethyl]-2-fluoroadenosine

3'-[[Bis(4-methoxyphenyl)phenylmethyl]amino]-2',3'-dideoxyadenosine

2'-Deoxy-N-[(1,1-dimethylethoxy)carbonyl]-2',2'-difluoroadenosine

3'-[(Acetyloxy)methyl]-2-amino-2',3'-dideoxyadenosine

3'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-3'-ethynyluridine

2'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-ethynyluridine

(2R,3S,5R)-5-(4-amino-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-3-hydroxy-2-(hydroxymethyl)tetrahydrofuran-2-carbonitrile

5-Bromo-7-(2-deoxy-4-C-ethynyl-β-D-erythro-pentofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

1-(3,5-Di-O-acetyl-2-deoxy-α-D-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

6-O-[[3-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-5-fluorophenyl]methyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyinosine

6-O-[[3,4-Bis[[bis(4-methoxyphenyl)phenylmethoxy]methyl]phenyl]methyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyinosine

6-O-[[3,4-Bis[[bis(4-methoxyphenyl)phenylmethoxy]methyl]phenyl]methyl]-2'-deoxyinosine

6-O-[[3-(Acetyloxy)-5-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]phenyl]methyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyinosine

6-O-[[3-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-5-hydroxyphenyl]methyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyinosine

6-O-[2-[Bis(4-methoxyphenyl)phenylmethoxy]ethyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyinosine