(5alpha)-7,8-Didehydro-4,5-epoxy-3-methoxy-17-methylmorphinan-6-one 4-27-00-03599 (Beilstein Handbook Reference) 467-13-0 6-Codeinone BRN 0094188 Codeinone EINECS 207-386-1 Morphinan-6-one, 7,8-didehydro-4,5-alpha-epoxy-3-methoxy-17-methyl- Morphinan-6-one, 7,8-didehydro-4,5-epoxy-3-methoxy-17-methyl-, (5-alpha)- (9CI)