1-(6-Amino-9H-purin-9-yl)-1,2-dideoxy-2-fluoro-4-C-(hydroxymethyl)-α-L-xylofuranurononitrile

4-Amino-1-(2-deoxy-4-C-ethynyl-2-methyl-β-D-arabinofuranosyl)-2(1H)-pyrimidinone

9-[2-Deoxy-4-C-ethynyl-2-(fluoromethyl)-β-Darabinofuranosyl]-1,9-dihydro-6H-purin-6-one

9-[2-Deoxy-4-C-ethynyl-2-(trifluoromethyl)-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Chloro-7-[2-deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-4-C-ethynyl-β-D-erythro-pentofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-

2-Furancarbonitrile,2-[(acetyloxy)methyl]tetrahydro-5-[2-oxo-4-(1H-1,2,4-triazol-1-yl)-1(2H)-pyrimidinyl]-,(2R-trans)-

2-Furancarbonitrile, 5-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-2-(hydroxymethyl)-, (2S-trans)-

4'-C-Cyano-2'-deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N,N-dimethyl-2-[(2-methyl-1-oxopropyl)amino]adenosine

4'-C-Cyano-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2',2'-difluorocytidine

4'-C-Cyano-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2',2'-difluorouridine

4'-C-Cyano-3'-deoxy-2',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2,2-dimethyl-1-oxopropyl)adenosine

Cytidine,4'-C-cyano-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine,4'-C-cyano-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-

α-L-erythro-Pentofuranurononitrile,4-C-[(benzoyloxy)methyl]-1,2-dideoxy-1-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-3-O-[(1,1-dimethylethyl)dimethylsilyl]-