[(2S,5R)-5-[(2-amino-6-oxo-3H-purin-9-yl)methyl]oxolan-2-yl]phosphonic acid [(2S,5R)-5-[(2-amino-6-oxo-3H-purin-9-yl)methyl]tetrahydrofuran-2-yl]phosphonic acid [(2S,5R)-5-[(2-amino-6-oxo-3H-purin-9-yl)methyl]-2-tetrahydrofuranyl]phosphonic acid [(2S,5R)-5-[(2-amino-6-keto-3H-purin-9-yl)methyl]tetrahydrofuran-2-yl]phosphonic acid AIDS-107462 AIDS107462 BCH-1573 trans-2-Dihydroxyphosphinoyl-5-(Guanin-9'-yl-methyl)-tetrahydrofuran