通过该课题的实施，对熊果酸及齐墩果酸结构进行修饰和改造，共计获得了23种三萜类衍生物，其中大多为新化合物。
By this research, 23 triterpenoid derivants have been prepared by structural modification of ursolic acid and oleanolic acid, and most of them are new compounds.
五种方法比较得出索氏提取得熊果酸和齐墩果酸含量最高；
The highest content of ursolic acid and oleanolic acid was obtained by soxhlet extraction methods comparing with other methods.
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