1) 2,4,6 – триметилгептан: CH3-CHCH3CH3CH3-CH2-CH2-CHCH3CH3CH3-CH2-CH3
2) 3-этил – 2,3 – диметилоктан: CH3-CHCH3CH3CH3-C2H5-CH2-CHCH3CH3CH3-CH3
1) 2,4,6 – триметилгептан: CH3-CHCH3CH3CH3-CH2-CH2-CHCH3CH3CH3-CH2-CH3
2) 3-этил – 2,3 – диметилоктан: CH3-CHCH3CH3CH3-C2H5-CH2-CHCH3CH3CH3-CH3