Isolation and structure elucidation of the phenolics of thesium chinense turcz using liquid chromato

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  Phenolic compounds are considered as secondary metabolites that are synthesized by plants during normal development and in response to stress conditions such as infection, wounding, and UV radiation, and other factors.These compounds occur ubiquitously in plants and include simple phenols, phenolic acids (both benzoic and cinnamic acid derivatives), coumarins, flavonoids, stilbenes, hydrolysable and condensed tannins, lignans,and lignins.In plant, phenolics may act as phytoalexins, antifeedants, attractants for pollinators, contributors to the plant pigmentation, antioxidants,and protective agents against UV light.Flavonoids also have wide biological activities, such as anti-oxidants, anti-cancer, anti-inflammatory and anti-HIV.
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