| abstract |
An aqueous pharmaceutical formulation comprising: (a) an active substance consisting of a compound of formula 1 n n nwherein: X − is chloride, bromide, iodide, sulfate, phosphate, methanesulfonate, nitrate, maleate, acetate, citrate, fumarate, tartrate, oxalate, succinate, benzoate, or p-toluenesulfonate; and (b) at least one pharmacologically acceptable acid. |