1) CH3-CH(CH3)-CH2-CH2-CH(CH3)-CH2-CH32) CH3-C(CH3)=CH-CH2-CH(CH3)-CH=CH23) CH3-CH2-C(CH3)=CH-CH2-CH2-C(CH3)(CH3)-CH3
1) CH3-CH(CH3)-CH2-CH2-CH(CH3)-CH2-CH3
2) CH3-C(CH3)=CH-CH2-CH(CH3)-CH=CH2
3) CH3-CH2-C(CH3)=CH-CH2-CH2-C(CH3)(CH3)-CH3