Guanosine, 2′-deoxy-4′-C-[(1,1-dimethylethoxy)carbonyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-

Guanosine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4′-C-formyl-N-(2-methyl-1-oxopropyl)-

Guanosine, 2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-4′-C-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-N-(2-methyl-1-oxopropyl)-

Guanosine, 2′-deoxy-3′,5′-di-O-[(1,1-dimethylethyl)dimethylsilyl]-4′-C-(hydroxymethyl)-N-(2-methyl-1-oxopropyl)-

N-[9-[(2R,4S)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]tetrahydro-5,5-bis(hydroxymethyl)-2-furanyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

Guanosine, 4′-C-[(acetyloxy)methyl]-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-

N-[6-[1,2-Bis(ethylthio)ethyl]-9-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-9H-purin-2-yl]-2-phenoxyacetamide

N-[6-[1,2-Bis(ethylthio)ethyl]-9-(2-deoxy-β-D-erythro-pentofuranosyl)-9H-purin-2-yl]-2-phenoxyacetamide

N-[6-[1,2-Bis(ethylthio)ethyl]-9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-9H-purin-2-yl]-2-phenoxyacetamide

9-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-6-(2,2-dibromoethenyl)-9H-purin-2-amine

N-[6-[1,2-Bis(ethylthio)ethyl]-9-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-9H-purin-2-yl]-2-phenoxyacetamide

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

Cytidine, 2′-deoxyadenylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-

Adenosine, thymidylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxy-

Adenosine, N-benzoyl-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-O-2-propenyl-

Adenosine, N-benzoyl-3′-O-2-propenyl-

Cytidine, N-benzoyl-2′-O-[2-[(dimethylamino)oxy]ethyl]-3′,5′-bis-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-

Cytidine, 2′-O-[2-[(dimethylamino)oxy]ethyl]-3′,5′-bis-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-

Uridine, 2′-O-[2-[(dimethylamino)oxy]ethyl]-3′,5′-bis-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[2-[(dimethylamino)oxy]ethyl]-N-(2-methyl-1-oxopropyl)-