目的：探讨夏枯草中总三萜类成分的提取工艺。

Objective: to study the extraction process of the total triterpenes from Common Selfheal with ultrasonic wave extraction.

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银杏茎中萜类内酯含量最低，相当于叶含量的1/3和根含量的1/2。叶中白果内酯含量在总萜类内酯中所占比例较高，而在根和茎中所占比例则较低。

Terpene lactone content of stem were the lowest, corresponding to 1/3 of leaves and 1/2 of root while bilobalide in leaves had a high ratio of total terpene lactone.

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