3-Acetoxy-17-methyl-4,5α-epoxy-7,8-didehydromorphinan-6α-ol

7,8-Didehydro-4,5α-epoxy-17-methylmorphinan-3,6α-diol 3-acetate

(5R,6S)-17-Methyl-7,8-didehydro-4,5-epoxymorphinan-3,6-diol 3-acetate