Synonyms: Normorphine hydrochloride;(5alpha,6alpha)-7,8-Didehydro-4,5-epoxymorphinan-3,6-diol hydrochloride;Morphinan-3,6-diol, 7,8-didehydro-4,5-epoxy-, hydrochloride, (5alpha,6alpha)-;(5alpha,6alpha)-7,8-didehydro-4,5-epoxymorphinan-3,6-diol hydrochloride (1:1);(5alpha,6alpha)-7,8-didehydro-4,5-epoxymorphinan-3,6-diol