Lignans and flavonoids from rhizome of Drynaria fortunei / 中草药

ABSTRACT

Objective: To study the chemical constituents from the rhizome of Drynaria fortunei. Methods: Silica gel, ODS, Sephadex LH-20 column chromatography, and semi-preparative HPLC were used to isolate pure compounds. The compounds were identified on the basis of their physicochemical properties and spectroscopic data. Results: Fourteen compounds were isolated from the rhizome of D. fortunei, including three lignans (1-3) and eight flavonoids (4-11). By spectroscopic techniques, such as 1H-NMR, 13C-NMR, and ESI-MS, these compounds were identified as (7′R,8′S)-dihydrodehydrodiconiferyl alcohol 4′-O-β-D-glucopyranoside (1), lariciresinol 4′-O-β-D-glucopyranoside (2), (-)-secoisolariciresinol 4-O-β-D-glucopyranoside (3), eriodictyol (4), eriodictyol 7-O-β-D-glucopyranoside (5), neoeriocitrin (6), naringin (7), luteolin (8), luteolin 7-O-β-D-glucopyranoside (9), luteolin 8-C-β-D- glucopyranoside (10), 2′,4′-dihydroxydihydrochalcone (11), maltol 3-O-β-D-glucopyranoside (12), β-sitosterol (13), and daucosterol (14). Conclusion: Compounds 1-3, and 11 are isolated from the plants in Polypodiaceae family for the first time, and compounds 5 and 8-10 are isolated from the plants of Drynaria (Bory) J. Sm. for the first time. Compound 1 is present as rotamers at room temperature.