1-Acetylcodeine

1-(7,8-Didehydro-4,5α-epoxy-6α-hydroxy-3-methoxy-17-methylmorphinan-1-yl)ethanone

1-(3-Methoxy-6α-hydroxy-17-methyl-4,5α-epoxy-7,8-didehydromorphinan-1-yl)ethanone