acceptable acid addition salts of the base compounds of this invention are those which form non toxic acid addition salts i e salts containing pharmacologically acceptable anions such as hydrochloride hydrobromide hydroiodide nitrate sulfate or bisulfate phosphate or acid phosphate acetate lactate citrate or acid citrate tartrate or bitartrate succinate maleate fumarate gluconate saccharate benzoate methanesulfonate and pamoate i e 1 1 39 methylene bis 2 hydroxy 3 naphthoate salts those compounds of the formula i which are also acidic in nature are capable of forming base salts with various pharmacologically acceptable cations examples of such salts include the alkali metal or alkaline earth metal salts and particularly the sodium and potassium salts these salts are all prepared by conventional techniques the chemical bases which are used as reagents to prepare the pharmaceutically acceptable base salts of this invention are those which form non toxic base salts with the herein described acidic compounds of formula i these non toxic base salts include those derived from such pharmacologically acceptable cations as sodium potassium calcium and magnesium etc these salts can easily be prepared by treating the corresponding acidic compounds with an aqueous solution containing the desired pharmacologically acceptable cations and then evaporating the resulting solution to dryness preferably under reduced pressure alternatively they may also be prepared by mixing lower alkanolic solutions of the acidic compounds and the desired alkali metal alkoxide together and then evaporating the resulting solution to dryness in the same manner as before in either case stoichiometric quantities of reagents.