Flavonoids from the Aerial Parts of Astilbe rivularis Buch.-Ham. ex D. Don

From the dried aerial part of Astilbe rivularis Buch.-Ham. ex D. Don collected in Sapa (Vietnam),  four compounds (1-4) were isolated. These compounds were identified as four flavonoids, including quercetin (1), isoquercitrin (2), engeletin (3) and quercitrin (4) on the basis of spectroscopic analyses and comparison with literature data. This is the first report on the presence of isoquercitrin (2), engeletin (3), and quercitrin (4) in the species A. rivularis.

Keywords: Astilbe rivularis, Flavonoids, Quercetin, Quercitrin, Isoquercitrin, Engeletin.

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