H3C—CH(CH3)—CH2—CH2—CH3
H3C—CH(CH3)—CH2—CH(CH3)—CH2—CH3
H3C—C(CH3)2—CH(C2H5)—CH(CH3)—CH2—CH2—CH3
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H3C—CH(CH3)—CH2—CH2—CH3
H3C—CH(CH3)—CH2—CH(CH3)—CH2—CH3
H3C—C(CH3)2—CH(C2H5)—CH(CH3)—CH2—CH2—CH3
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