A new chromone glycoside from Dryopteris fragrans / 中草药

ABSTRACT

Objective: To study the chemical constituents from the whole plants of Dryopteris fragrans. Methods: The chemical constituents were isolated by various column chromatographic methods. The structures of the compounds were elucidated on the basis of physiochemical properties and spectral analysis. Results: Four compounds named 2-ethyl-5, 7-dihydroxy-1'-O-β-Dglucopyranosyl chromone (1), vitexin (2), isoquercitrin (3), and divarin-3-O-β-glucopyranoside (3-hydroxy-5-propylphenyl-O-β-Dglucopyranoside, 4) were isolated and identified. Conclusion: Compound 1 is a new compound named as frachromone A, compound 2 is obtained from this plant for the first time, and compound 4 is reported for the first time from the plants of family Dryopteridaceae.