小蓬草鲜花和鲜果精油挥发性组分分析

Volatiles of Essential Oils of Fresh Flowers and Fresh Achenes from Conyza canadensis

利用气质联用仪(GC-MS)对水蒸气蒸馏提取小蓬草鲜花和鲜果精油的挥发性组分进行了分析,结果表明精油组分中匹配度96%以上的共5种化合物:烃类化合物2种,醇类化合物2种,酮类化合物1种。其中含有常用作香料的顺式-2-甲基-5-异丙烯基-2-环己烯-1-醇(顺式香芹醇)、反式-2-甲基-5-异丙烯基-2-环己烯-1-醇(反式香芹醇)和(s)-2-甲基-5-异丙烯基-2-环己烯-1-酮(s-香芹酮),此外还含有2,6-二甲基-6-(4-甲基-3-戊烯基)双环[3.1.1]庚-2-烯。萜类化合物、脂肪酮具有化感作用,小蓬草鲜花和鲜果精油具有开发为香料、除草剂的潜在价值。

The volatile components in essential oils of Conyza canadensis fresh flowers and fresh achenes extracted by steam distillation were analyzed by GC-MS. The results show that essential oils contained five compounds, including two kinds of hydrocarbons, two kinds of alcohols, one kind of ketone at above 96 % of match quality. The volatiles contained four perfumes which were cis-2-methyl-5-（ 1-methylethenyl ）-2-cyclohexen-1-ol （ carveol ） , trans-2-methyl-5-（ 1-methylethenyl ）-2-cyclohexen-1-ol （ trans-carveol）, and （ s ） -2-methyl-5- （ 1 -methylethenyl ） -2-cyclohexen-1 -one （ s-carvone ）. They also contained 2,6-dimethyl-6- （4-methyl-3-pentenyl）-bicyclo[ 3.1. 1 ] hept-2-ene. The essential oil of C. canadensis fresh flowers and fresh achenes have potential values on perfume and herbicide because of terpenoids and alkyl ketones with allelopathy.