1-(4,5α-Epoxy-3,6-dimethoxy-17-methyl-6α,14α-aetheno-morphinan-7α-yl)-aethanon, 7α-acetyl-6,14-endo-etheno-6,7,8,14-tetrahydrothebaine, (5α,7α)-4,5-epoxy-17-methyl-3,6-dimethoxy-7α-acetyl-6,14-ethenomorphinan, 7α-acetyl-6,14-endoethenotetrahydrothebaine, 1-(4,5α-epoxy-3,6-dimethoxy-17-methyl-6α,14α-etheno-morphinan-7α-yl)-ethanone, 7α-acetyl-6,7,8,14-tetrahydro-6,14-endo-ethenothebaine