Abstract
Fractions of biologically active substances, including polysaccharides, iridoids, phenolic acids, and flavonoids have been isolated from Euphrasia brevipila (Scrophulariaceae family) herbs by chromatography on polyamide sorbent. The following compounds were identified: aucubin; chlorogenic, ferulic and caffeic acids; apigenin; luteolin; diosmetin; cinaroside; and cosmosiin. The antioxidant activity of the isolated biologically active substances was assessed on the model of lanolin autooxidation at 70°C in comparison with butyloxytoluene. The maximum antioxidant activity was observed for the fraction of phenolic acids, which produced a fourfold increase in the stability of lanolin with respect to oxidation.
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