CH3 CH3 CH.CHCHCH CH2CH3 CH3CH一CHCH2CH2CH CH2CHs CH2CH3 Named as a hexane with NOT as a hexane with wo substituents one substituent C2004 Thomson-Brooks/Cole 1CH3 7CH3 2CH2 6CH2 CH3一CHCH-CH2CHg NOT CH3一CHCH-CH2CH 3 14 54 CH,CH,CH CH,CH2CH 5 6 321 @2004 Thomson-Brooks/Cole