Application of Cluster Analysis in Classification of Radix Scutellariae A quantitative method for simultaneous assay of four flavones with one marker in Radix Scutellariae 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 Effective component changes in compatibility of Radix et Rhizoma Rhei with Radix Scutellariae in Xiexin Decoction Processing method and HPLC fingerprint of Charred Radix Scutellariae Effects of processing and extracting methods on active components in Radix Scutellariae by HPLC analysis