Flavonoids from the Fern Pronephrium penangianum
The genus Pronephrium (Abacopteris) belongs to the Thelypteridaceae and comprises approximately 61 species that are found in tropical and subtropical zones of Asia . Earlier research regarding the chemical constituents of the Thelypteridaceae species revealed the presence of an array of structurally interesting compounds, including unusual C-methylflavonoids such as flavan-4-ol glucosides, 3-deoxyanthocyanins, and flavones with a modified B-ring [2, 3, 4, 5]. Pronephrium penangianum is widely distributed in the south of China and has been used as a folk medicine for releasing swelling analgesia, removing stasis, and promoting fracture healing . Previous investigation on the constituents of the plant has isolated a lot of compounds such as flavan-4-ol glucosides, anthocyanidins, flavones, phenylpropanoids, and steroids, and some of the compounds were found to possess antioxidant, antiradical, anti-benign prostatic hyperplasia, anti-inflammatory, hypolipidemic, vascular...
KeywordsMeOH EtOAc Flavone Kaempferol CD3OD
The authors acknowledge Grant No. 2005DFA30670 for international collaborative research from Chinese Ministry of Science and Technology, and Grant No. 2009CC018 from Yunnan Province of China for basic research in social development.
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