Patent ID: 7888337

Claim:
A composition comprising: a therapeutically effective amount of formula I: wherein A is PO(OR)(OR′), where R and R′ are independently selected from H, C1-C6 alkyl, aryl, and X, X being a cationic counterion selected from the group consisting of ammonium, methyl ammonium, dimethylammonium, trimethylammonium, tetramethylammonium, ethanol-ammonium, dicyclohexylammonium, guanidinium, ethylenediammonium cation, lithium cation, sodium cation, potassium cation, cesium cation, beryllium cation, magnesium cation, calcium cation, and zinc cation; and R 1 is NH 2 , NH 3 + H 2 PO 4 − , or NH(C═NH)NH 2 ; and a pharmaceutical carrier.