N-[6-[[5-[[[[1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]amino]carbonyl]oxy]-1-oxo-4-[(triphenylphosphoranylidene)amino]pentyl]amino]-1-oxohexyl]-L-α-aspartyl-L-aspartic acid

N-Bicyclo[3.1.0]hex-3-yl-6-chloro-1-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

N-Bicyclo[3.1.0]hex-3-yl-2-chloro-7-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

Cyclopropanol, 1-[2-[4-(cyclopentylamino)-7-[2,3-O-(1-methylethylidene)-5-O-(phosphonomethyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-2-yl]ethynyl]-

Cyclopropanol, 1-[2-[4-(cyclopentylamino)-7-[5-O-[(diethoxyphosphinyl)methyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-2-yl]ethynyl]-

N-Cyclopentyl-7-[5-O-[(diethoxyphosphinyl)methyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-iodo-7H-pyrrolo[2,3-d]pyrimidin-4-amine

N-Cyclopentyl-2-iodo-7-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

N-Cyclopentyl-7-[5-O-[(1,1-dimethylethyl)diphenylsilyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-iodo-7H-pyrrolo[2,3-d]pyrimidin-4-amine

4-Chloro-7-[5-O-[(1,1-dimethylethyl)diphenylsilyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-iodo-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-O-[(1,1-dimethylethyl)diphenylsilyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-2-amine

1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 4-(cyclopentylamino)-1-[5-deoxy-2,3-O-(1-methylethylidene)-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-

1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 4-(cyclopentylamino)-1-[5-deoxy-5-[[(diethoxyphosphinyl)methyl]sulfonyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-

1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 4-(cyclopentylamino)-1-[5-S-[(diethoxyphosphinyl)methyl]-2,3-O-(1-methylethylidene)-5-thio-β-D-ribofuranosyl]-

4-(Cyclopentylamino)-1-[2,3-O-(1-methylethylidene)-5-O-(methylsulfonyl)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidine-6-carbonitrile

4-(Cyclopentylamino)-1-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidine-6-carbonitrile

2-Chloro-N-cyclopentyl-7-[5-O-[hydroxy(phosphonomethoxy)phosphinyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

2,4-Dichloro-7-[5-O-[hydroxy(phosphonomethoxy)phosphinyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

7H-Pyrrolo[2,3-d]pyrimidin-4-amine, 7-[5-[[[bis(1-methylethoxy)phosphinyl]methyl]sulfonyl]-5-deoxy-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-chloro-N-cyclopentyl-