ISOLATION OF SOME FLAVONOIDS FROM Vitex trifolia IN BACHMA NATIONAL PARK, THUA THIEN HUE, VIETNAM
Using combined chromatographic methods, three flavonoids, (2S)-7,4'-
dihydroxy-5-methoxyflavanone (1), luteolin (2), and 2¢¢-O-rhamnosylvitexin (3) were
isolated from the methanol extract of the leaves of Vitex trifolia. Their structures
were established on the basis of spectroscopic evidence and comparison with those
reported in the literature.