3甲烷己烷：CH3CH2CH(CH3)CH2CH2CH32,3,5-三甲基-4-乙基庚烷:CH3CH(CH3)CH(CH3)CH(C2H5)CH(CH3)CH2CH2CH3
C-C-C-C-C-C ∣ C C ∣C-C-C-C-C-C-C ∣ ∣ ∣ C C C-C
