1) CH3-CH (CH3) - CH (C2H5) - CH2-CH (CH3) - CH2-CH2-CH3
2) CH2=C=CH-CH3
3) CH2=C (CH3) - CH (CH3) - CH2-CH3
1) CH3-CH (CH3) - CH (C2H5) - CH2-CH (CH3) - CH2-CH2-CH3
2) CH2=C=CH-CH3
3) CH2=C (CH3) - CH (CH3) - CH2-CH3