[Qualitative analysis of Chinese drug xiakucao (Prunella)].

  title={[Qualitative analysis of Chinese drug xiakucao (Prunella)].},
  author={Hongwei Wang and Zhi Yong Zhang and Z X Zia and Ziren Su and C. S. Li},
  journal={Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica},
  volume={18 11},
          655-7, 702
A high performance gas chromatographic procedure has been developed for the quantitation of ursolic acid and oleanolic acid in different parts of Xiakucao collected in different periods. The study provides a scientific foundation for increased availability and rational collecting periods of Xiakucao. 

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