Uridine, 5′-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]uridylyl-(3′→5′)-uridylyl-(3′→5′)-

Uridine, 2′-O-acetyl-5′-O-phosphonouridylyl-(3′→5′)-2′-O-acetyluridylyl-(3′→5′)-, 2′,3′-diacetate

Uridine, 2′-O-acetyl-5′-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]uridylyl-(3′→5′)-2′-O-acetyluridylyl-(3′→5′)-, 2′,3′-diacetate

Guanosine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]thymidylyl-(3′→5′)-2′-deoxy-N-(4-methoxybenzoyl)cytidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxobutyl)guanylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-

Thymidine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]thymidylyl-(3′→5′)-2′-deoxy-N-(4-methoxybenzoyl)cytidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxobutyl)guanylyl-(3′→5′)-

3′-Cytidylic acid, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-(4-chlorophenyl)-2′-deoxycytidylyl-(3′→5′)-N-benzoyl-2′-deoxy-, mono(4-chlorophenyl) ester

Uridine, 5′-O-[(4-chlorophenoxy)acetyl]-P-(2-chlorophenyl)-N-(4-methoxybenzoyl)-2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)cytidylyl-(3′→5′)-2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-

Thymidine, 5′-O-[[3-[2,3-dihydro-2-[5-[1-(3-hydroxypropyl)-3,3-dimethyl-3H-indolium-2-yl]-2,4-pentadienylidene]-3,3-dimethyl-1H-indol-1-yl]propoxy]hydroxyphosphinyl]adenylyl-(3′→5′)-thymidylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-thymidylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxyadenylyl-...

N′-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-6-chloro-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

N′-[2-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-6-chloro-2H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dibutylmethanimidamide

N′-[2-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-6-chloro-2H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dibutylmethanimidamide

N′-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-6-chloro-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

N′-[6-Chloro-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

N,N-Dibutyl-N′-[6-chloro-2-(2-deoxy-β-D-erythro-pentofuranosyl)-2H-pyrazolo[3,4-d]pyrimidin-4-yl]methanimidamide

6-Chloro-2-(2-deoxy-β-D-erythro-pentofuranosyl)-2H-pyrazolo[3,4-d]pyrimidin-4-amine

6-Chloro-2-[2-deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-4-(1-methylethoxy)-2H-pyrazolo[3,4-d]pyrimidine

6-Chloro-1-[2-deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-4-(1-methylethoxy)-1H-pyrazolo[3,4-d]pyrimidine

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1H-pyrazolo[3,4-d]pyrimidine

2-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-2H-pyrazolo[3,4-d]pyrimidine

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-1H-pyrazolo[3,4-d]pyrimidine