(2-Ethoxyethyl)trimethylammonium iodide 16332-51-7 4358-14-9 Ammonium, 2-ethoxyethyltrimethyl-, iodide Choline ethyl ether Ethanaminium, 2-ethoxy-N,N,N-trimethyl-, iodide (9CI) Ethoxyethyltrimethylammonium iodide O-Ethylcholine iodide