. . "Suitable salts with bases are, for example, corresponding alkali metal or alkaline earth metal salts, for example sodium, potassium or magnesium salts, pharmaceutically acceptable transition metal salts, such as zinc or copper salts, or salts with ammonia or organic amines, such as cyclic amines, such as mono-, di- or tri-hydroxy-C1 -C7 alkylamines, hydroxy-C1 -C7 alkyl-C1 -C7 alkylamines or polyh" . .