(2R,3S,4R,5R)-Tetrahydro-2-[2-(1-methylethyl)-2H-tetrazol-5-yl]-5-[2-[[2-(1-methyl-1H-imidazol-4-yl)ethyl]amino]-6-[(2-phenylethyl)amino]-9H-purin-9-yl]-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(3,3-Dimethylbutyl)amino]-2-[[2-(1-methyl-1H-imidazol-4-yl)ethyl]amino]-9H-purin-9-yl]tetrahydro-5-[2-(1-methylethyl)-2H-tetrazol-5-yl]-3,4-furandiol

(2R,3R,4S,5R)-2-[6-Amino-2-[[2-(2-pyridinylamino)ethyl]amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-Amino-2-[[2-(1-methyl-1H-imidazol-4-yl)ethyl]amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-Amino-2-[(trans-4-aminocyclohexyl)amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(3,3-Dimethylbutyl)amino]-2-[[(1S)-1-(hydroxymethyl)-2-phenylethyl]amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(3,3-Dimethylbutyl)amino]-2-[[2-(2-pyridinylamino)ethyl]amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3S,4R,5R)-2-(2-Ethyl-2H-tetrazol-5-yl)tetrahydro-5-[2-[[2-(1-methyl-1H-imidazol-4-yl)ethyl]amino]-6-[[2-(4-morpholinyl)ethyl]amino]-9H-purin-9-yl]-3,4-furandiol

(2R,3S,4R,5R)-2-(2-Ethyl-2H-tetrazol-5-yl)tetrahydro-5-[2-[[2-(4-morpholinyl)ethyl]amino]-6-[(2-phenylethyl)amino]-9H-purin-9-yl]-3,4-furandiol

(2R,3S,4R,5R)-2-(2-Ethyl-2H-tetrazol-5-yl)tetrahydro-5-[6-[[(3-iodophenyl)methyl]amino]-2-[[2-(4-morpholinyl)ethyl]amino]-9H-purin-9-yl]-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(2,2-Diphenylethyl)amino]-2-[(2-hydroxyethyl)amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(2,2-Diphenylethyl)amino]-2-[[2-(1-piperidinyl)ethyl]amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(2,2-Diphenylethyl)amino]-2-[(tetrahydro-1,1-dioxido-3-thienyl)amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(2,2-Diphenylethyl)amino]-2-[[2-(4-morpholinyl)ethyl]amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-[(2,2-Diphenylethyl)amino]-2-[[2-(1-pyrrolidinyl)ethyl]amino]-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol

(2R,3R,4S,5R)-2-[6-Amino-2-[[2-(3,4-dimethoxyphenyl)ethyl]amino]-9H-purin-9-yl]tetrahydro-5-[2-(1-methylethyl)-2H-tetrazol-5-yl]-3,4-furandiol

(2R,3R,4S,5R)-2-[6-(Cyclopentylamino)-2-[[2-(1-methyl-1H-imidazol-4-yl)ethyl]amino]-9H-purin-9-yl]tetrahydro-5-[2-(1-methylethyl)-2H-tetrazol-5-yl]-3,4-furandiol

(2R,3R,4S,5R)-Tetrahydro-2-[6-[[(1S)-1-(hydroxymethyl)-2-phenylethyl]amino]-2-[[2-(1-methyl-1H-imidazol-4-yl)ethyl]amino]-9H-purin-9-yl]-5-[2-(1-methylethyl)-2H-tetrazol-5-yl]-3,4-furandiol

(2R,3R,4S,5R)-2-[6-Amino-2-[[2-(3,4-dimethoxyphenyl)ethyl]amino]-9H-purin-9-yl]tetrahydro-5-(2-methyl-2H-tetrazol-5-yl)-3,4-furandiol

(2R,3R,4S,5R)-2-[6-Amino-2-[[(1S)-1-(hydroxymethyl)-2-phenylethyl]amino]-9H-purin-9-yl]tetrahydro-5-(2-methyl-2H-tetrazol-5-yl)-3,4-furandiol