9-[(2S,5R)-5-[[[(1,1-Dimethylethyl)diphenylsilyl]oxy]methyl]tetrahydro-2-furanyl]-1,9-dihydro-6H-purin-6-one

2-Amino-9-[(2S,5R)-5-[[[(1,1-dimethylethyl)diphenylsilyl]oxy]methyl]tetrahydro-2-furanyl]-1,9-dihydro-6H-purin-6-one

6H-Purin-6-one, 2-amino-9-[3-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-β-L-erythro-pentofuranosyl]-1,9-dihydro-

9H-Purin-6-amine, 9-[3-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-β-L-erythro-pentofuranosyl]-2-fluoro-

9H-Purin-2-amine, 6-chloro-9-[3-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-β-L-erythro-pentofuranosyl]-

9H-Purine, 6-chloro-9-[3-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-β-L-erythro-pentofuranosyl]-2-fluoro-

6H-Purin-6-one, 9-[3-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-β-L-erythro-pentofuranosyl]-1,9-dihydro-

9-[3-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-β-L-erythro-pentofuranosyl]-9H-purin-6-amine

6-Chloro-9-[3-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-β-L-erythro-pentofuranosyl]-9H-purine

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[3-(3-pyridinyl)propyl (S)-bis(1-methylethyl)phosphoramidite]

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[3-(3-pyridinyl)propyl (R)-bis(1-methylethyl)phosphoramidite]

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-5-cyano-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

N′-[5-Cyano-7-(2-deoxy-β-D-erythro-pentofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-5-cyano-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide