(2R,3R,3aS,9aR)-2-(2,2-Difluoroethyl)-2,3,3a,9a-tetrahydro-3-hydroxy-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-6-one

Guanosine, 2′,3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-thio-

Guanosine, 2′,3′-O-(1-methylethylidene)-5′-thio-

Guanosine, 5′-deoxy-N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-5′-[(5-nitro-2-pyridinyl)dithio]guanylyl-(3′→5′)-2′,3′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-phenoxyacetyl)-

Guanosine, 5′-deoxy-N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-5′-[(5-nitro-2-pyridinyl)dithio]guanylyl-(3′→5′)-2′,3′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-

Guanosine, P-(2-cyanoethyl)-5′-deoxy-N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-5′-[(5-nitro-2-pyridinyl)dithio]guanylyl-(3′→5′)-N-[2-[4-(1-methylethyl)phenoxy]acetyl]-, 2′-acetate 3′-(hydrogen butanedioate)

3′-Cytidylic acid, N-acetyl-P-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]guanylyl-(3′→5′)-guanylyl-(3′→5′)-uridylyl-(3′→5′)-cytidylyl-(3′→5′)-guanylyl-(3′→5′)-guanylyl-(3′→5′)-

3′-Guanylic acid, 5′-deoxy-N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-5′-[(5-nitro-2-pyridinyl)dithio]-, mono(2-chlorophenyl) ester

Guanosine, 5′-deoxy-N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-5′-[(5-nitro-2-pyridinyl)dithio]-

Guanosine, N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-5′-thio-, 3′,5′-diacetate

Guanosine, N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-5′-thio-, 5′-acetate

Guanosine, N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-, 5′-(4-methylbenzenesulfonate)