The present invention relates to compounds and methods for treating viral diseases. Some compounds of the invention are described by Formula I: (I), wherein M+ is Na+, Li+, K+, Ca2+, Mg2+, or NRcRdReRf+ and Rc, Rd, Re and Rf are each independently hydrogen or C1-5 alkyl, or a stereoisomer, a diastereomer, an enantiomer or racemate thereof.