7,9-dimethoxy-3-methyl-1,2,3,4,7,7a-hexahydro-4a,7-ethano-4,12-methanobenzofuro[3,2-e]isoquinolin-14-one

4,5α-epoxy-3,6-dimethoxy-17-methyl-6β,14-ethano-morphin-7-ene

4,5α-epoxy-3,6-dimethoxy-6β,14-ethano-morphin-7-ene-17-carbonitrile

7β-chloro-7α-cyano-4,5α-epoxy-3,6-dimethoxy-N-methyl-6α,14α-endo-ethenoisomorphinane

17-cyclopropanecarbonyl-4,5α-epoxy-3,6-dimethoxy-6,14-ethano-morphinane