Synonyms: Hydroxycodeinone;14-Hydroxycodeinone;BRN 4552573;(5alpha)-7,8-Didehydro-4,5-epoxy-14-hydroxy-3-methoxy-17-methylmorphinan-6-one;Codeinone, 14-hydroxy-;Morphinan-6-one, 7,8-didehydro-4,5-epoxy-14-hydroxy-3-methoxy-17-methyl-, (5-alpha)- (9CI);14-hydroxy-3-methoxy-17-methyl-7,8-didehydro-4,5-epoxymorphinan-6-one;(5alpha)-14-hydroxy-3-methoxy-17-methyl-7,8-didehydro-4,5-epoxymorphinan-6-one