Discrimination of Cotidis Rhizoma from different habitats by support vector machine Study on dissolution of four alkaloid contents in compatability of Coptidis Rhizoma and Rheui Radix et Rhizoma based on compatability ratio and pH value environment by quantitative analysis of multi-components by single marker Fingerprint study of Wuji Pill by UPLC-MS/MS Determination of berberine hydrochloride, epiberberine, jatrorrhizine, palmatine, and glyeyrrhizinate in Coptidis Rhizoma Compound Decoction by HPLC Determination of berberine hydrochloride, epiberberine, jatrorrhizine, palmatine, and glyeyrrhizinate in Coptidis Rhizoma Compound Decoction by HPLC Dertermination of six alkaloids in different parts of Coptis chinensis by HPLC Simultaneous determination of six alkaloids in Coptis chinensis of different regions by RP-HPLC Dertermination of six alkaloids in different parts of Coptis chinensis by HPLC Alkaloids from Zuojin Formula and their cytotoxicities against proliferation of cancer cells Determination of six alkaloids in crude and processed Coptidis Rhizoma with quantitative analysis of multi-components by single marker Absorption characteristics of alkaloids in Fuzheng Xiaozheng Fang by rat everted intestinal sac models Identification of metabolites of epiberberine in rat liver microsomes and its inhibiting effects on CYP2D6 Inhibition of rutaecarpine on in vitro hepatic metabolism of five Coptis alkaloids in rats