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

1-Deoxy-1-[6-[(2,2-diphenylethyl)amino]-2-[(3R)-3-[(4-pyridinylcarbonyl)amino]-1-pyrrolidinyl]-9H-purin-9-yl]-N-ethyl-β-D-ribofuranuronamide

N-[(3R)-1-[6-[(2,2-Diphenylethyl)amino]-9-[(2R,3R,4S,5S)-5-(3-ethyl-5-isoxazolyl)tetrahydro-3,4-dihydroxy-2-furanyl]-9H-purin-2-yl]-3-pyrrolidinyl]-3-pyridinecarboxamide

1-[2-(3′R)-[1,3′-Bipyrrolidin]-1′-yl-6-[(2,2-diphenylethyl)amino]-9H-purin-9-yl]-1-deoxy-N-ethyl-β-D-ribofuranuronamide

N-[(3R)-1-[6-[[2,2-Bis(4-hydroxyphenyl)ethyl]amino]-9-[(2R,3R,4S,5R)-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-dihydroxy-2-furanyl]-9H-purin-2-yl]-3-pyrrolidinyl]-4-pyridinecarboxamide

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

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

(2R,3R,4S,5S)-2-[2-(3′R)-[1,3′-Bipyrrolidin]-1′-yl-6-[(2,2-diphenylethyl)amino]-9H-purin-9-yl]-5-(3-ethyl-5-isoxazolyl)tetrahydro-3,4-furandiol

N-[(3R)-1-[6-[[2,2-Bis(4-hydroxyphenyl)ethyl]amino]-9-[(2R,3R,4S,5S)-5-(3-ethyl-5-isoxazolyl)tetrahydro-3,4-dihydroxy-2-furanyl]-9H-purin-2-yl]-3-pyrrolidinyl]-4-pyridinecarboxamide

(2R,3R,4S,5S)-2-[2-(3′R)-[1,3′-Bipyrrolidin]-1′-yl-6-[(1-ethylpropyl)amino]-9H-purin-9-yl]-5-(3-ethyl-5-isoxazolyl)tetrahydro-3,4-furandiol

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

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

Methyl 2-[(3R)-1-[6-[(2,2-diphenylethyl)amino]-9-[(2R,3R,4S,5R)-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-dihydroxy-2-furanyl]-9H-purin-2-yl]-3-pyrrolidinyl]-2,3-dihydro-1H-isoindole-5-carboxylate

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

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

4-[[(3R)-3-[[[[(3S)-1-[6-[(2,2-Diphenylethyl)amino]-9-(N-ethyl-β-D-ribofuranuronamidosyl)-9H-purin-2-yl]-3-pyrrolidinyl]amino]carbonyl]amino]-1-pyrrolidinyl]carbonyl]benzoic acid

Methyl 4-[[(3R)-3-[[[[(3S)-1-[6-[(2,2-diphenylethyl)amino]-9-(N-ethyl-β-D-ribofuranuronamidosyl)-9H-purin-2-yl]-3-pyrrolidinyl]amino]carbonyl]amino]-1-pyrrolidinyl]carbonyl]benzoate

1-Deoxy-1-[6-[(2,2-diphenylethyl)amino]-2-[(3R)-3-[[[(3R)-3-pyrrolidinylamino]carbonyl]amino]-1-pyrrolidinyl]-9H-purin-9-yl]-N-ethyl-β-D-ribofuranuronamide

Adenosine, N-(2,2-diphenylethyl)-2-[(3S,4S)-3-(hydroxymethyl)-4-(phenylmethyl)-1-pyrrolidinyl]-