(5alpha)-4,5-Epoxy-14-hydroxy-3-methoxymorphinan-6-one 57664-96-7 Morphinan-6-one, 4,5-epoxy-14-hydroxy-3-methoxy-, (5alpha)- (9CI) morphinan-6-one, 4,5-epoxy-14-hydroxy-3-methoxy-, (5alpha)-