[4-(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecyl)phenyl]methyl N-[(2E)-3-[1-[5-O-(dichlorophosphinyl)-β-D-ribofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-2-propen-1-yl]carbamate

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-2',2'-difluorouridine

4'-C-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2',2'-difluorouridine

5-Chloro-1-[2,3-dideoxy-2-fluoro-3-[hydroxy(2-phenylethyl)amino]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

4'-C-(Chloromethyl)-2'-deoxy-2',5-difluorouridine

4'-C-(Chloromethyl)-2'-deoxy-2'-fluoroadenosine 5'-(tetrahydrogen triphosphate)

2'-Deoxy-4'-C-ethyl-2'-fluoroadenosine 5'-(tetrahydrogen triphosphate)

2'-Deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2'-fluoroguanosine

4'-C-(Chloromethyl)-2'-deoxy-2'-fluoroguanosine

2'-Deoxy-4'-C-ethyl-2'-fluoroadenosine

2'-Deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2'-fluoroadenosine

4'-C-(Chloromethyl)-2'-deoxy-2'-fluoroadenosine

2'-Deoxy-4'-C-ethyl-2'-fluoroguanosine

2'-Deoxy-4'-C-ethyl-2'-fluoroguanosine 5'-(tetrahydrogen triphosphate)

2'-Deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-2'-fluoroguanosine

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

2'-Deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-2',2'-difluorouridine

4'-C-Azido-3'-deoxy-3'-fluoroguanosine

3'-(Azidomethyl)-2',3'-dideoxyadenosine

(2'R)-4'-C-Azido-2'-(2-chloroethynyl)-2'-deoxy-2'-fluoroadenosine