From the root of Scutellaria baicalensis GEORGI, three new flavonoids, II, III and IV, were isolated, together with 5, 7, 2'-trihydroxyflavone (I) and baicalein-7-O-β-D-glucopyranoside (V). The structures of II, III and IV were established as 5, 7, 2'-trihydroxy-8, 6'-dimethoxyflavone, 5, 7, 2', 5'-tetrahydroxy-8, 6'-dimethoxyflavone and 5, 2', 5'-trihydroxy-6, 7, 8-trimethoxyflavone, respectively.
