4-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-1-methylpyridinium methyl sulphate, 4-(7-(Diethylamino)-2-oxo-2H-1-benzopyran-3-yl)-1-methylpyridiniummethyl sulphate, 4-[7-(DIETHYLAMINO)-2-OXO-2H-1-BENZOPYRAN-3-YL]-1-METHYLPYRIDINIUM METHYL SULFATE, 7-(Diethylamino)-3-(1-methylpyridin-4(1H)-ylidene)-2-oxo-2,3-dihydro-1-benzopyran-1-ium methyl sulfate