1) CH3-CHCH3CH3CH3-CHCH3CH3CH3-CH2-CH2-CH32) CH3-CH2-CH2-CH2-CHCH3CH3CH3-CH2-CH33) CH3-CHCH3CH3CH3-CHCH3CH3CH3-CH2-CH2-CH2-CH2-CH34) CH3-CCH3CH3CH3CH3CH3CH3-CCH3CH3CH3CH3CH3CH3-CCH3CH3CH3CH3CH3CH3-CCH3CH3CH3-CH2-CH2-CH3
1) CH3-CHCH3CH3CH3-CHCH3CH3CH3-CH2-CH2-CH3
2) CH3-CH2-CH2-CH2-CHCH3CH3CH3-CH2-CH3
3) CH3-CHCH3CH3CH3-CHCH3CH3CH3-CH2-CH2-CH2-CH2-CH3
4) CH3-CCH3CH3CH3CH3CH3CH3-CCH3CH3CH3CH3CH3CH3-CCH3CH3CH3CH3CH3CH3-CCH3CH3CH3-CH2-CH2-CH3