(5alpha)-6,7-Didehydro-4,5-epoxy-3,6-dimethoxy-17-methylmorphinan 1385-04-2 561-25-1 57281-79-5 8,14-Dihydrothebaine Dihydrothebaine EINECS 209-216-1 Morphinan, 6,7-didehydro-4,5-alpha-epoxy-3,6-dimethoxy-17-methyl- (8CI) Morphinan, 6,7-didehydro-4,5-epoxy-3,6-dimethoxy-17-methyl- (5-alpha,14-xi)- (9CI) Thebaine, dihydro- delta(sup 6)-Dihydrothebaine