Sterols and flavone from the leaves of Vernonia amygdalina growing in Thua Thien Hue
Keywords:Vernonia amygdalina, sterol, vernoniamygda A, vernoniamygda B, luteolin
By using various chromatographic methods, two sterols and one flavone, vernoniamygda A (1), vernoniamygda B (2), and luteolin (3) were isolated from the methanol extract of the leaves of Vernonia amygdalina. Their structures were determined using 1D, 2D-NMR and ESI-MS analysis as well as by comparison with the reported data. Compounds 1 and 2 were reported from natural for the first time.
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