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