... đôiCH3CH2CH=C-CH2-CH-CH2-CH-CH3C2H5CH31 2 3 4 5 6 7 8 9CH3 6- etyl-4,8-dimetylnonen-4 6- etyl-4,8-dimetylnon-4-en 6 - etyl - 4,8 - dimetyl - 4 - nonen ... etylenCH3CH=CH-CH(CH3)2metyl isopropyl etylen DXCH3CH2CH-CH=CH2CH3metyl etyl etylen BDXCH3-CH=C(CH3)2 trimetyl etylenCH3-CH= C(CH3)C2H51-etyl-1,2-dimetyletylen1. ... 8 9CH3 6- etyl-4,8-dimetylnonen-4 6- etyl-4,8-dimetylnon-4-en 6 - etyl - 4,8 - dimetyl - 4 - nonen...