Studies on anti-complementary activity of extracts and isolated flavones from Ligustrum vulgare and Phillyrea latifolia leaves (Oleaceae).
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Polar fractions and flavones isolated from methanolic extracts of the leaves of Ligustrum vulgare and Phillyrea latifolia (Oleaceae), whose popular use as an anti-inflammatory is well-known in Mediterranean historical medicine and ethnobotany, showed significant in vitro complement inhibiting effect on the classical pathway of the complement system. Among the isolated flavonoidic structures, apigenin-7-O-glucoside, apigenin-7-O-rutinoside, luteolin-4'-O-glucoside, luteolin-7-O-glucoside and ligustroflavone presented remarkable activity.