FLAVONOIT COMPOUNDS FROM DONG VAN MINT FLOWER (Elsholtzia winitiana var. dongvanesis Phuong) IN VIETNAM

Abstract

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.