with m negative charges preferably an anion with m negative charges selected from among chloride bromide iodide sulphate phosphate methanesulphonate nitrate maleinate acetate benzoate citrate malate lactate salicylate trifluoroacetate fumarate tartrate oxalate succinate ethanedisulphonate benzoate and p toluenesulphonate m denotes 1 or 2 and wherein n a and r 1 may each have one of the meanings given hereinbefore or hereinafter optionally in the form of the tautomers mixtures of the tautomers hydrates or solvates thereof r 2 denotes h methyl ethyl cf 3 fluorine chlorine oh or methoxy r 3 denotes methyl ethyl cyclopropyl cyclohexyl cf 3 fluorine chlorine oh cn methoxy ethoxy cooh coo methyl coo ethyl or coo butyl or r 2 and r 3 together denote a 2 bonded group selected from o u2014 ch 2 u2014 o or ch u2550 ch u2014 ch u2550 ch y m u2212 denotes an anion with m negative charges preferably an anion with m negative charges selected from among chloride bromide iodide sulphate methanesulphonate nitrate maleinate acetate benzoate citrate malate lactate salicylate trifluoroacetate fumarate tartrate oxalate succinate and ethanedisulphonate m denotes 1 or 2 and wherein n a and r 1 may each have one of the meanings given hereinbefore or hereinafter optionally in the form of the tautomers mixtures of the tautomers hydrates or solvates thereof r 2 denotes h methyl fluorine chlorine oh or methoxy r 3 methyl ethyl cf 3 fluorine chlorine oh.