The content of phenolic acids was determined by high performance thin-layer chromatography and densitometry and by HPLC in herbal preparation Naran N elaborated in the Department of Chemistry of the Medical University in Lublin, Poland. Methanolic extracts from plant components of Naran N: Anthodium Chamomillae, Herba Euphrasiae, Folium Plantaginis lanceolatae, Flos Calendulae were analysed. In the extract from Anthodium Chamomillae protocatechuic, vanillic, ferulic, caffeic, chlorogenic and p-coumaric acids were identified; in the extract from Herba Euphrasiae p-coumaric, ferulic, caffeic, protocatechuic, vanillic, chlorogenic and 3-hydroxybenzoic acids, in the methanolic extract from Folium Plantaginis lanceolatae vanillic, p-coumaric, caffeic, ferulic, chlorogenic and protocatechuic acids were found; the same number of phenolic acids were detected in the methanolic extract of Flos Calendulae, these were p-coumaric, caffeic, syringic, chlorogenic, vanillic, protocatechuic and ferulic acids.
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