Ethanol extracts from Bergenia crassifolia (L.) Fritsch. green leaves exhibit antioxidant properties. The most significant activity has been observed for 70% ethanol extract, which is a typical acceptor of peroxy radicals. Fractionation of the active extract yielded chloroform and ethyl acetate fractions, which also showed a pronounced antioxidant action. Phenolic compounds (hydroquinone, quercetin, dihydroquercetin, rutin, gallic acid, esculetin) also exhibited significant antioxidant activity comparable with that of ionol. 620 0091-150X/06/4011-0620

Extracts of the above-ground part of meadowsweet (Filipendula ulmaria L. Maxim.) demonstrate a pronounced antioxidant activity. It is established that 70% and 95% ethanol extracts contain the most active substances. Investigation of the chemical composition of the above-ground part of the plant and its 70% ethanol extract by means of qualitative reactions, thin-layer chromatography, and paper chromatography showed the presence of various phenolic compounds, including quercetin and its glycosides, dihydroquercetin, apigenin, rododendrol, esculetin, and m-hydroxybenzoic, salicylic, anisic, gallic, gentisic, ferulic, chlorogenic, and caffeic acids.

A chromatographically inseparable crystalline mixture of the previously undescribed quercetin-4′-O-β-galactopyranoside and the known quercetin-3-O-β-glucopyranoside (isoquercitrin) in a 7:5 ratio was isolated from the extract of the aerial part of Filipendula ulmaria (L.) Maxim.

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