Phenolic constituents of the aerial parts of Impatiens glandulifera Royle (Balsaminaceae) and their antioxidant activities |
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| Authors: | Katarzyna Szewczyk Serhat Sezai Cicek Christian Zidorn Sebastian Granica |
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| Institution: | 1. Chair and Department of Pharmaceutical Botany, Medical University of Lublin, Lublin, Poland;2. Department of Pharmaceutical Biology, Christian-Albrechts-University of Kiel, Kiel, Germany;3. Department of Pharmacognosy and Molecular Basis of Phytotherapy, Warsaw Medical University, Warsaw, Poland |
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| Abstract: | As a continuation of investigating Impatiens L. genus, eight flavonoids, eriodyctiol, eriodyctiol 7-O-β-?-glucoside, kaempferol 3-O-β-?-glucoside, kaempferol 3-O-β-?-galactoside, kaempferol 3-rhamnosyl-di-glucoside, kaempferol 3-O-β-?-rutinoside, quercetin 3-O-β-?-glucoside and quercetin 3-O-β-?-galactoside, two phenolic acids – p-hydroxybenzoic acid and protocatechuic acid, and 2-methoxynaphthalene-1,4-dione were isolated from the aerial parts of I. glandulifera collected in Poland. The structures of the compounds were established by analysis of their spectroscopic (1H and 13C NMR) and spectrometric (MS) data, as well as by comparison of these with those reported in the literature. Quercetin 3-O-β-?-glucoside, kaempferol 3-O-β-?-galactoside and kaempferol 3-O-β-?-rutinoside were isolated for the first time from the investigated taxon. In addition, the antioxidant activities in different tests of all obtained compounds were evaluated. The results clearly showed that among analyzed constituents, quercetin 3-O-β-?-glucoside exhibited antioxidant activity comparable or better than ascorbic acid and Trolox which were used as a positive control. |
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| Keywords: | Impatiens glandulifera Balsaminaceae phenolics flavonoids antioxidant activity |
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