CH:CH2C=CCHCH2CH3 5甲基3-庚炔 CH3C=CCHCH2CH=CH2 CH3C=CCHCH2CH=CHCH3 C2H5 CH-CH2 4-乙基-1-庚烯-5-炔 5-乙烯基-2-辛烯-6-炔 CH3 CH2 C CCHCH2 CH3 CH3 5-甲基-3-庚炔 CH3C CCHCH2CH=CH2 C2H5 CH3C CCHCH2CH=CHCH3 CH=CH2 4-乙基-1-庚烯-5-炔 5-乙烯基-2-辛烯-6-炔