(R-(R*,R*))-beta-(2-(Dimethylamino)propyl)-alpha-ethyl-beta-phenylbenzeneethanol HCl 49570-63-0 Benzeneethanol, beta-(2-(dimethylamino)propyl)-alpha-ethyl-beta-phenyl-, hydrochloride, (R-(R*,R*))- alpha-d-Methadol hydrochloride