16549-56-7 2-(N-Cyclopropylmethyl-4,5alpha-epoxy-3,6-dimethoxy-6,14-endo-ethenomorphinan-7alpha-yl)-2-butanol 22-Cyclopropyl-7alpha-((R)-1-hydroxy-1-methylpropyl)-6,14-endo-ethenotetrahydrothebaine Homprenorfina Homprenorphin Homprenorphine Homprenorphine [INN:BAN] Homprenorphinum RS 5205 M