2′-Deoxyguanylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyguanosine

3,7-Dihydro-8-methoxy-3-methyl-7-β-D-ribofuranosyl-1H-purine-2,6-dione

8-Bromo-3,7-dihydro-3-methyl-7-β-D-ribofuranosyl-1H-purine-2,6-dione

8-Bromo-3,7-dihydro-3-methyl-7-(2,3,5-tri-O-acetyl-α-L-ribofuranosyl)-1H-purine-2,6-dione

8-Bromo-3,7-dihydro-3-methyl-7-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-1H-purine-2,6-dione

Methyl 2-[[9-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-2-(formylamino)-9H-purin-6-yl]oxy]acetate

Methyl 2-[[9-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-2-(formylamino)-9H-purin-6-yl]oxy]acetate

Methyl 2-[[9-(2-deoxy-β-D-erythro-pentofuranosyl)-2-(formylamino)-9H-purin-6-yl]oxy]acetate

Methyl 2-[[9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-2-[[(dimethylamino)methylene]amino]-9H-purin-6-yl]oxy]acetate

Methyl 2-[[2-amino-9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-9H-purin-6-yl]oxy]acetate

6-(1-Pyrrolidinyl)-9-[2,3,5-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-9H-purine

6-(2H-Benzotriazol-2-yl)-9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-9H-purine

6-(2H-Benzotriazol-2-yl)-9-[2,3,5-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-9H-purine

6-(5,6-Dichloro-1H-benzotriazol-1-yl)-9-[2,3,5-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-9H-purine

9-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-6-(5,6-dichloro-1H-benzotriazol-1-yl)-9H-purine

6-(1H-Benzotriazol-1-yl)-2-phenyl-9-[2,3,5-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-9H-purine

6-(6-Chloro-1H-benzotriazol-1-yl)-9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-9H-purin-2-amine

6-(5-Chloro-1H-benzotriazol-1-yl)-9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-9H-purin-2-amine