Synonyms: Morphinan-6-one,4,5-epoxy-3-hydroxy-17-methyl-, hydrochloride, (5a)- (9CI); Morphinan-6-one, 4,5a-epoxy-3-hydroxy-17-methyl-,hydrochloride (8CI); Morphinone, dihydro-, hydrochloride (6CI);4,5-Epoxy-3-hydroxy-N-methyl-6-oxomorphinan hydrochloride; Dihydromorphinonehydrochloride; Dilaudid; Dilaudid hydrochloride; Hydromorphodone; Hydromorphonehydrochloride; Hymorphan; Laudicon; NSC 117862; Palladone