NHỮNG HỢP CHẤT FLAVONOIT TỪ HOA CỦA CÂY BẠC HÀ ĐỒNG VĂN (Elsholtzia winitiana var. dongvanesis Phuong) Ở VIỆT NAM

Tóm tắt

Four flavonoids, including: quercetine (1), rutin (2), hesperidin (3), (+) - catechin (4) were isolated
from the methanol extract of Dong Van mint flower (Elsholtzia winitiana var. dongvanesis Phuong)
collected from Dong Van rocky plateau, Ha Giang province by chromatographic methods such as thin
layer chromatography, column chromatography and their structure is elucidated on the basis of
nuclear magnetic resonance methods (NMR) one-way and two-dimensional, mass spectrometry (MS).
This is the first report on the chemical composition of mint flower in Dong Van, Vietnam.