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Determination of four flavonoids from Yupingfeng prescription in different compatibility proportion by HPLC Determination of four flavonoids from Yupingfeng prescription in different compatibility proportion by HPLC Isolation of flavonoids from Spatholobus suberectus by high speed countercurrent chromatography and study on their anti-tumor activities Isolation of flavonoids from Spatholobus suberectus by high speed countercurrent chromatography and study on their anti-tumor activities Determination of biochanin A and formononetin in Trifolium pratense extract by HPLC-ELSD and DAD RADIOIMMUNOASSAY FOR FORMONONETIN Spectrum-effect relationship of active fraction from Hedysari Radix on improving immunity Correlation of contents between soil nutrients and calycosin and formononetin in Hedysari Radix Chemical constituents in flavonoids from root of Glycyrrhiza uralensis Correlation on quality and ecotype of Astragalus membranaceus var. mongholicus Determination of daidzein，genistein，formononetin，and biochanin A in Millettla nitida var．hirsutissima extract by RP-HPLC Studies on the Chemical Constituents of Sparganium stoloniferum Buch.-Ham. Quantitative analysis of calycosin-7-O-β-D-glucoside and formononetin in Astraglus membranaceus var. mongholicus by different processing methods Quantitative analysis of calycosin glycoside and formononetin in Radix Astragali from different sources In vitro dissolution of Qishe Pills Quality evaluation system of Astragali Radix by chemometrics Investigation on Chemical Thmponentsof Derixtion of Radix Paeeniae and Radix Glycyrrhizae Chemical constituents from Periploca forestti Enzymatic extraction process of calycosin glucoside and pormononetin in Astragali Radix with quadratic general rotary unitized design