The chemical components of the volatile oil extracted from the root(Duhuo) of Angelica pubescens grown in three habitats were analyzed by GC-MS.29 compositions composed of 82% of the total volatile oil were identified from Zheduhuo;44(94%)from Ziqiuduhuo;25(55%)from Chuanduhuo.The result shows that the difference of the chemical components of the volatile in the root of Angelica pubescens from these three habitats is obvious.
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