After three times crystallization, ursolic acid was purified to 95.10%.

三次结晶后熊果酸产品的纯度达到95.10%。

However,the study on the molecular mechanism of the antineoplastic action of ursolic acid is not clear. It has impeded the exploitation and application of the new drug.

我们发现,国内多侧重于植化方面的研究,国外在药理学上的研究较多,但是,目前对乌索酸抗肿瘤的具体分子机制仍缺乏深入的研究,严重阻碍了新药的开发和应用。

The mobile phase for ursolic acid and oleanolic acid was methanol and water (90:10) at pH 3.10 (adjusted by 50% phosphoric acid) and 210 nm as the detective wavelength.

此法分析熊果酸和齐墩果酸的色谱条件为：甲醇水体系（90：10，V／V），50％磷酸调pH3.10，检测波长为210nm。