Studies on the Constituents of Scutellaria Species. II. On the Flavonoid Constituents of the Root of Scutellaria baicalensis GEORGI (2)

Abstract

From the root of Scutellaria baicalensis GEORGI, two new flavonoids, III and IV, were isolated, together with 5-hydroxy-7, 8-dimethoxyflavone (I), norwogonin (II) and dihydrobaicalin (V). The structures of III and IV were established as 5, 7, 2'-trihydroxy-6-methoxyflavone and 5, 2'-dihydroxy-6, 7, 8-trimethoxyflavone, respectively.