40925-27-7 5alpha,9alpha-Diethyl-2'-hydroxy-2-methylenecyclopropylmethyl-6,7-benzomorphan 6,11-Diethyl-1,2,3,4,5,6-hexahydro-3-((methylenecyclopropyl)methyl)-2,6-methano-3-benzazocin-7-ol UM 747 UM-747