(2,3-Dihydro-2-methyl-3-oxo-5-benzofuranyl)trimethylammonium iodide 31537-98-1 5-Trimethylammonium-2-methylcoumaran-3-one iodine AMMONIUM, (2,3-DIHYDRO-2-METHYL-3-OXO-5-BENZOFURANYL)TRIMETHYL-, IODIDE