CH2CH3 CH;-Cn2-cn-e-cn Cn-CHs 5 6 CHs CHs 4,6-二甲基-5-乙基-3-庚烯 5-ethyl -4,6-dimethyl 3-heptene 65 3 CH一C=C-CH2一CH-CH=CH2 CH2-CH2-CH3 3-(正)丙基，1-庚烯-5-炔 5-乙烯基-1,3-环戊二烯 C CH CH3 CH3 CH2 CH CH2 CH3 CH CH3 CH3 1 2 3 4 5 6 7 4 , 6 - 二甲基 - 5 -乙基- 3 - 庚烯 5 - ethyl - 4 , 6 - dimethyl - 3 - heptene 7 6 5 4 3 2 1 3 - (正)丙基 - 1 - 庚烯 - 5 - 炔 1 2 3 4 5 5 - 乙烯基 -1 , 3 - 环戊二烯 ? CH3 C C CH2 CH CH CH2 CH2 CH2 CH3 ? ?