Fig. 1From: Chemical and pharmacological evaluations on the extract of Scutellaria baicalensis Georgi (Huang-Qin) prepared by various extraction methodsRepresentative HPLC–UV (at 280 nm) of base peak chromatographic profiles of authentic standards used. Nine major HPLC peaks were detected and identified as flavones. Their chemical structures are also shown. 6-hydroxyflavone was used as the internal standard (I.S.)Back to article page