Synonyms: Thebaine hydrochloride;6,7,8,14-Tetradehydro-4,5-alpha-epoxy-3,6-dimethoxy-17-methylmorphinan hydrochloride;NSC 11428;Thebain hydrochlorid;Thebain hydrochlorid [German];Thebaine HCl;(5alpha)-6,7,8,14-Tetradehydro-4,5-epoxy-3,6-dimethoxy-17-methylmorphinan hydrochloride;Morphinan, 6,7,8,14-tetradehydro-4,5-alpha-epoxy-3,6-dimethoxy-17-methyl-, hydrochloride;Morphinan, 6,7,8,14-tetradehydro-4,5alpha-epoxy-3,6-dimethoxy-17-methyl-, hydrochloride (8CI);(5alpha)-3,6-dimethoxy-17-methyl-6,7,8,14-tetradehydro-4,5-epoxymorphinan hydrochloride