2,6-Methano-3-benzazocin-8-ol, 1,2,3,4,5,6-hexahydro-6-ethyl-11-methyl-3- (3-methyl-2-butenyl)- 2-(3,3-Dimethylallyl)-5-ethyl-2'-hydroxy-9-methyl-6,7-benzomorphan 3639-66-5 5-Ethyl-2'-hydroxy-2(N)-(3-methyl-2-butenyl)-9-methyl-6,7-benzomorphan NIH 7980 WIN 20264