为了有效利用其中主要组分，需选择合适的分离方法制取一定纯度的单体。
In order to utilize the primary components isoprene, cyclopentadiene and piperylene efficiently, the appropriate method for separation should be selected to gain pure monomer.
皂苷是三七中的主要活性成分，科学家已经从三七中分离得到了超过70种的单体皂苷。
Saponins are the main active ingredient, Modern studies have showed that more than 70 different kinds of saponins have been isolated and identified from Sanqi.
目的：分离及鉴定前荷叶碱单体。
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