(5alpha,6beta)-7,8-Didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol 143-70-4 EINECS 205-607-6 Morphinan-3,6-beta-diol, 7,8-didehydro-4,5-alpha-epoxy-17-methyl- alpha-Isomorphine