(2'R)-2'-Deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-2'-fluoro-2'-methylcytidine

(2'R)-5'-O-[(2R,4S)-4-(3-Chlorophenyl)-2-oxido-1,3,2-dioxaphosphorinan-2-yl]-2'-deoxy-2'-fluoro-2'-methylcytidine

5'-Azido-2',5'-dideoxy-3'-O-dephosphinicoguanylylcarbonylimino-(3'→5')-2',5'-dideoxyguanosine

2',5'-Dideoxy-3'-O-dephosphinico-5'-[(dimethoxyphosphinyl)amino]guanylylcarbonylimino-(3'→5')-2',5'-dideoxyguanosine

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

2',5'-Dideoxy-3'-O-dephosphinico-5'-[[(1,1-dimethylethoxy)carbonyl]amino]guanylylcarbonylimino-(3'→5')-2',5'-dideoxyguanosine

2-Fluoro-2'-O-methyladenosine

5'-O-[(1,1-Dimethylethyl)dimethylsilyl]-N-[(4-methoxyphenyl)diphenylmethyl]-3'-O-methyladenosine

5'-O-[(1,1-Dimethylethyl)dimethylsilyl]-3'-O-methyladenosine

2-Chloro-5'-S-[(3S)-1-[(1,1-dimethylethoxy)carbonyl]-5-(methoxycarbonyl)-3-pyrrolidinyl]-2',3'-O-(1-methylethylidene)-5'-thioadenosine

5'-S-[(1R,2S)-2-Aminocyclopentyl]-5'-thioadenosine

5'-S-[(3S)-1-[(1,1-Dimethylethoxy)carbonyl]-3-pyrrolidinyl]-2',3'-O-(1-methylethylidene)-5'-thioadenosine

5'-S-[(3S)-1-Methyl-3-pyrrolidinyl]-2',3'-O-(1-methylethylidene)-5'-thioadenosine

5'-S-[(3S,5S)-5-(Aminocarbonyl)-1-[(1,1-dimethylethoxy)carbonyl]-3-pyrrolidinyl]-2',3'-O-(1-methylethylidene)-5'-thioadenosine

5'-S-[(3R)-1-[(1,1-Dimethylethoxy)carbonyl]-3-pyrrolidinyl]-2',3'-O-(1-methylethylidene)-5'-thioadenosine

5'-S-[(3S,5S)-5-(Aminocarbonyl)-3-pyrrolidinyl]-5'-thioadenosine

2-Chloro-5'-S-(3S)-3-pyrrolidinyl-5'-thioadenosine

5'-S-(3S)-3-Piperidinyl-5'-thioadenosine

5'-S-[(2R,4S)-2-Carboxy-4-piperidinyl]-5'-thioadenosine

5'-S-[(3S)-1-Methyl-3-pyrrolidinyl]-5'-thioadenosine