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![(2R)-2-[(5alpha,18R)-3,6-dimethoxy-17-methyl-7,8-didehydro-18,19-dihydro-4,5-epoxy-6,14-ethenomorphinan-18-yl]-4-phenylbutan-2-ol](https://structimg.guidechem.com/11/47/186586.png)



