Methyl3-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2-fluoro-4-C-[3-(trimethylsilyl)-1,2-propadien-1-yl]-β-D-arabinofuranosyl]-3,6-dihydro-2,6-dioxo-1(2H)-pyrimidinecarboxylate

1-[(1R,3R,4R,7S)-7-(Acetyloxy)-1-[(acetyloxy)methyl]-5-oxo-2-oxabicyclo[2.2.1]hept-3-yl]-2,4(1H,3H)-pyrimidinedione

4'-C-Ethenyl-5'-O-(2-oxido-4H-1,3,2-benzodioxaphosphorin-2-yl)uridine

Uridine,2',3'-O-cyclohexylidene-4'-C-[(1Z)-2-chloroethenyl]-5-methyl-,5'-(2,2-dimethylpropanoate)

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

3-Benzoyl-2'-chloro-2'-deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4'-C-ethenyluridine

Uridine,4'-C-acetyl-5-methyl-3',5'-bis-O-(phenylmethyl)-,2'-methanesulfonate

Thymidine,4'-C-(2-chloroethenyl)-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-

5'-O-[(1,1-Dimethylethyl)diphenylsilyl]-4'-C-(1-methylethenyl)-3'-O-(2-naphthalenylmethyl)uridine

N-Benzoyl-2-(benzoylamino)-2'-deoxy-4'-C-ethenyl-2'-fluoroadenosine

2'-Deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2',2'-difluoro-3-(methoxycarbonyl)-4'-C-1,2-propadien-1-yluridine

N-[4'-C-Ethenyl-P-(1-methylethyl)-5'-cytidylyl]-L-alanine-methylethylester

N-[9-[2-Deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-4-C-ethenyl-2-fluoro-β-Darabinofuranosyl]-6-(dimethylamino)-9H-purin-2-yl]-2-methylpropanamide

N,N'-(4'-C-Ethenyl-5'-uridylylidene)bis[Lalanine]1,1'-dihexylester

1-[4-C-[(1Z)-2-Chloroethenyl]-2-deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-β-Darabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

2'-Deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2',2'-difluoro-3-(methoxycarbonyl)-4'-C-[3-(trimethylsilyl)-1,2-propadien-1-yl]uridine

N-[9-[5,6-Dideoxy-2-O-[(1,1-dimethylethyl)dimethylsilyl]-4-C-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-β-D-xylo-hex-5-enofuranosyl]-9H-purin-6-yl]-2,2-dimethylpropanamide

N-Benzoyl-4'-C-[(1E)-2-chloroethenyl]-2',3'-dideoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]cytidine

N,N'-(4'-C-Ethenyl-5'-uridylylidene)bis[Lalanine]1,1'-bis(1-methylethyl)ester

1-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4-C-phenyl-β-L-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione