1) CH3 - C(CH3)(CH3) - CH(CH2-CH3) - CH2 - CH(CH2-CH3) - CH2 - CH2 - CH3
2) CH2 = CH - C(CH3)(CH3) - CH(CH3) - CH2 - C H2- CH3
3) CH3 - CH(CH3) - C -= C - C(CH2-CH2-CH3)(CH2-CH2-CH3) - CH2 - CH2 - CH2 - CH3
1) CH3 - C(CH3)(CH3) - CH(CH2-CH3) - CH2 - CH(CH2-CH3) - CH2 - CH2 - CH3
2) CH2 = CH - C(CH3)(CH3) - CH(CH3) - CH2 - C H2- CH3
3) CH3 - CH(CH3) - C -= C - C(CH2-CH2-CH3)(CH2-CH2-CH3) - CH2 - CH2 - CH2 - CH3