Synonyms: 3-Heptanone,6-(dimethylamino)-4,4-diphenyl-, hydrochloride, (-)- (8CI); 3-Heptanone,6-(dimethylamino)-4,4-diphenyl-, hydrochloride, (6R)- (9CI); 3-Heptanone,6-(dimethylamino)-4,4-diphenyl-, hydrochloride, (R)-; (-)-Methadonehydrochloride; D-(-)-Methadone hydrochloride; Levomethadone hydrochloride;Levorotatory methadone hydrochloride;l-6-Dimethylamino-4,4-diphenyl-3-heptanone hydrochloride; l-Methadonehydrochloride; l-Polamidon hydrochloride