2',5'-Dideoxy-5'-[[1-(ethoxycarbonyl)propyl]amino]-2',2'-difluorocytidine

L-Alanine, 5'-ester with (2'R)-2'-deoxy-2'-fluoro-2',5-dimethyl-3'-C-methyluridine

L-Alanine, N-[(1,1-dimethylethoxy)carbonyl]-, 5'-ester with (2'R)-2'-deoxy-2'-fluoro-2',5-dimethyl-3'-C-methyluridine

5'-S-[[6-(Methylamino)-9-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-9H-purin-8-yl]methyl]-2',3'-O-(1-methylethylidene)-5'-thiouridine

5'-S-[[9-[5-O-[Dimethyl(1,1,2-trimethylpropyl)silyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-(methylamino)-9H-purin-8-yl]methyl]-2',3'-O-(1-methylethylidene)-5'-thiouridine

3',5'-Dideoxy-5'-(methylamino)-5-methyluridine

2'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-8-ethynyladenosine

N-[(9H-Fluoren-9-ylmethoxy)carbonyl]-2'-O-[(methylthio)methyl]-3',5'-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]guanosine

5'-O-[6,8-Bis(1,1-dimethylethyl)-5-fluoro-2-oxido-4H-1,3,2-benzodioxaphosphorin-2-yl]-2',3'-dideoxy-3'-fluoro-5-iodouridine

2-(Cyanomethyl)-2',3',5'-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-6-O-methylinosine

2-Iodo-6-O-methylinosine

2'-O-[1-(2-Chloroethoxy)ethyl]-2'-C-methyluridine

(3'R)-3'-Deoxy-3'-fluoro-3'-methyluridine

2'-O-[(1,1-Dimethylethyl)dimethylsilyl]-3'-O-methyluridine

3'-[[(2R,3R)-2-Amino-3-fluoro-1-oxo-3-phenylpropyl]amino]-3'-deoxy-N,N-dimethyladenosine