CHs CH3 NOT CH3 CH3 1,3-Dimethylcyclohexane 1,5-Dimethyleyclohexane Lower Higher HC CH2CH 1 6 2 CHa 1-Ethyl-2,6-dimethylcycloheptane H C CH2CHa ↑ Higher CH3 NOT H.C CH2CHs 1 23 2-Ethyl-1,4-dimethylcycloheptane 4 CH3 Lower Lower 3-Ethyl-1,4-dimethylcycloheptane Higher 2004 Thomson-Brooks/Cole