Studies on the constituents of Scutellaria species. IX. On the flavonoid constituents of the root of Scutellaria indica L.

Four new flavanones (I-IV) and a new flavone (V) were isolated from the root of Scutellaria indica L., together with 2 (S) -5, 2'-dihydroxy-7, 8, 6'-trimethoxyflavanone, (±) -5, 2'-dihydroxy-6, 7, 6'-trimethoxyflavanone, 5, 7-dihydroxy-8, 2'-dimethoxy flavone, rivularin, 5, 2', 6'-trihydroxy-7, 8-dimethoxyflavone, scutevurin, 5, 7, 4'-trihydroxy-8-methoxyflavone, wogonin, alpinetin, caldamomin and wogonin 7-O-glucuronide. Compounds I-V (Fig. 1) were identified based on spectral data and simple chemical modifications.

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