Flavonoids from roots of Ephedra sinica
- Author:
Hua-Ming TAO
1
Author Information
1. School of Traditional Chinese Medicine
- Publication Type:Journal Article
- Keywords:
Ephedrannin A;
Flavonoids;
Mahuannin A;
Mahuannin B;
The roots of Ephedra sinica stapf
- From:
Chinese Traditional and Herbal Drugs
2011;42(9):1678-1682
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To study the flavonoids from the roots of Ephedra sinica in Ephedra Tourn. ex L. Methods: The roots of E. sinica were extracted with 90% ethanol, and isolated and purified by silica gel, Sephadex LH-20, and RP-18 gel column chromatography. All the compounds were identified based on spectral analyses (including MS, 1H-NMR, and 13C-NMR). Results: Thirteen flavonoids were isolated from the roots of E. sinica and were characterized as ephedrannin A (1), mahuannin A (2), mahuannin B (3), mahuannin D (4), apigenin (5), kaempferol (6), quercetin (7), dihydroquercetin (8), 3′, 4′, 5, 7-tetrahydroxy flavanone (9), (+)-catechin (10), (-)-epi-catechin (11), afzelechin (12), and (-)-epi-afzelechin (13), respectively. Conclusion: Compounds 7-13 are obtained from this plant for the first time.
