The whole herb of Hypericum subalatum Hayata contains three flavonoids, caffeic acid esters, a pyranoxanthone, and three xanthines, in addition to the previously reported xanthonolignoids. Among these compounds, 2,7‐dihydroxy‐3,4‐dimethoxyxanthone has not been described in the literature before. The co‐occurrence of xanthone derivatives and flavonoids in this plant is of chemotaxonomic significance.
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