A new flavone derivative from Ehretia ovalifolia leaves

From the methylene chloride extract of Ehretia ovalifolia leaves, a new fla vone derivative named ovalifolin [3-(3-methyl-1-butenyl)-6-methoxy-5,7,4 ' -trihydroxy flavone] has been isolated and identified together with the kno wn flavone aglycones apigenin, luteolin and the highly methoxylated flavano l araneosol. The structures of these metabolites have been established on t he basis of chemical, chromatographic and spectral methods.