<span>1) 2,3-диметилбутадиен-1,3</span>
<span> CH3</span>
<span> ǀ</span>
<span> H2C = C - C = CH2</span>
<span> ǀ</span>
<span> CH3</span>
<span>
</span>
<span><span>2) 3,4-диэтилгексин-1</span></span>
<span><span> C2H5</span></span>
<span><span> ǀ</span></span>
<span><span>HC≡C - CH- CH -CH2 - CH3</span></span>
<span><span> ǀ</span></span>
<span><span> C2H5</span></span>