Discussion on processing methods for herbs in San′aotang of prescription and clinical application in syndrome differentiation Analysis of monosaccharide compositions of ESP-B1 from Ephedrae Herba by HPLC pre-column derivatization Determination of markers from characteristic HPLC chromatogram of phenols in three official origins of Ephedrae Herba and quantitative analysis of four phenols Effect of Cinnamomi Ramulus on distribution kinetics of ephedrine and pseudoephedrine from Ephedrae Herba in brain tissues of mice Optimization of extraction technology for Xiaochuan Decoction based on information entropy theory