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Extraction and Separatiom of Ursolic Acid from Dregs of a Decoction of Eriobotrya japonica Leaf

LI Kai-quan et al (Key Laboratory of Province for Research on Active Ingredients in Natural Medicines,Chemistry & Bioengineering College of Yichun University,Yichun,Jiangxi 336000)  
The chemical composition from dregs of a decoction of Eriobotrya japonica leaf was studied and the high-tech content ursolic acid from dregs of a decoction of Eriobotrya japonica was prepared after poach can produce antiinflammation and relieve a cough drug:pipa sirupus.The dry dregs of a decoction of Eriobotrya japonica leaf were extracted with 7 times of volume of alcohol at 80?℃ for 1?h and two times,and then the extracts were purified with the specific impurity remover "YCXY-1" to yield ursolic acid with high purity.A mass of triterpene acids were consisted in dregs of a decoction of Eriobotrya japonica leaf,and the content of ursolic acid was high.The production technology of ursolic acid was predigested from dregs of a decoction of Eriobotrya japonica leaf,the process was simple and the cost of production was enormously low.This research supplied scientific gist for second exploitation and utilization of Eriobotrya japonica leaf.
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