The IUPAC name of the following compound is: 3-ethyl-4-methylhex-4-ene, 4,4-diethyl-3-methylbut-2-ene, 4-Ethyl-3-methylhex-2-ene, 4-methyl-3-ethylhex-4-ene

The IUPAC name of the following compound is 4−Ethyl−3-methylhex−2−ene. Here the longest chain of carbon contains 6 carbon atoms and there is a double bond between carbon number 2 and 3. Thus parent chain is hexene. Also, ethyl and methyl groups are attached to the carbon number 4 and 3 respectively.