(2-Hydroxypropyl)trimethylammonium chloride 1-Propanaminium, 2-hydroxy-N,N,N-trimethyl-, chloride 2-Hydroxy-N,N,N-trimethyl-1-propanaminium chloride 2382-43-6 7562-87-0 AMMONIUM, (2-HYDROXYPROPYL)TRIMETHYL-, CHLORIDE EINECS 219-183-5 beta-Methylcholine chloride