Application of Cluster Analysis in Classification of Radix Scutellariae Effective component changes in compatibility of Radix et Rhizoma Rhei with Radix Scutellariae in Xiexin Decoction A quantitative method for simultaneous assay of four flavones with one marker in Radix Scutellariae Processing method and HPLC fingerprint of Charred Radix Scutellariae Effects of processing and extracting methods on active components in Radix Scutellariae by HPLC analysis Relationship between antioxidant activities and contents of active ingredients in Radix Scutellaria Comparative study on chemcial composition between cultivated and wild Radix Scutellariae A quantitative method for simultaneous assay of four flavones with one marker in Radix Scutellariae