1. I made up this problem myself in order to practice. I stumped myself. I'm such a genius, I'm aware It's basically alkene nomenclature with the E,Z naming scheme. 2. Picture See below. I've taken the liberty of already numbering the longest chain. 3. The attempt at a solution Without the double bond, I know that the name of this compound would be 6-butyl-5,7-diethyl-3-methylundecane. With the double bond, I think it might be (5E)-6-butyl-5,7-diethyl-3-methyl-5-undecene. Is this right? I'm not entirely sure.