Studies on the Constituents of Scutellaria Species. III. On the Flavonoid Constituents of the Root of Scutellaria baicalensis GEORGI (3)

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.

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