Patent ID: 7820811

Claim:
A compound selected from: (2R,3R,4R,5R)-5[6-amino-2-(cyclopentylmethoxy)-9H-purin-9-yl]-2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol; (2R,3R,4R,5R)-5-{6-amino-2-[(2,2,3,3-tetrafluorocyclobutyl)oxy]-9H-purin-9-yl}-2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol; (2R,3R,4R,5R)-5[6-amino-2-(2,5-difluorophenoxy)-9H-purin-9-yl]-2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol; (2R,3R,4R,5R)-5[6-amino-2-(3,4-difluorophenoxy)-9H-purin-9-yl]-2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol; (2R,3R,4R,5R)-5[6-amino-2[4-chloro-3-(trifluoromethyl)phenoxy]-9H-purin-9-yl]-2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol; (2R,3R,4R,5R)-5-(6-amino-2-{[(1S)-1-methylpropyl]amino}-9H-purin-9-yl)- 2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol; and (2R,3R,4R,5R)-5-[6-amino-2-(cyclohexylamino)-9H-purin-9-yl]-2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol.