[2-[(4-amino-2-oxopyrimidin-1-yl)methoxy]-3-hydroxybutyl]phosphonic acid [2-[(4-amino-2-oxo-pyrimidin-1-yl)methoxy]-3-hydroxy-butyl]phosphonic acid [2-[(4-amino-2-oxo-1-pyrimidinyl)methoxy]-3-hydroxybutyl]phosphonic acid [2-[(4-amino-2-keto-pyrimidin-1-yl)methoxy]-3-hydroxy-butyl]phosphonic acid AIDS-155286 AIDS155286 Phosphonic acid, [2-[(4-amino-2-oxo-1(2H)-pyrimidinyl)methoxy]-3-hydroxybutyl]-