(R*,R*)-(+-)-beta-(2-(Dimethylamino)propyl)-alpha-ethyl-beta-phenylbenzeneethanol HCl 55123-63-2 Benzeneethanol, beta-(2-(dimethylamino)propyl)-alpha-ethyl-beta-phenyl-, hydrochloride, (R*,R*)-(+-)- alpha-(+-)-Methadol hydrochloride