Abstract
This study aimed to analyse phenolic compounds in wild medicinal flowers of Crataegus monogyna, Cytisus multiflorus, Malva sylvestris and Sambucus nigra, by HPLC-DAD-ESI/MS. Flavonols and flavones were the main groups in almost all the studied samples. C. multiflorus sample gave the highest levels of flavonoids, being a chrysin derivative the most abundant flavone. C. monogyna revealed the highest concentration in phenolic acids that were not found in C. multiflorus; 5-O-caffeoylquinic acid was the most abundant phenolic acid found in the first species, being a procyanidin trimer also found. Kaempferol-3-O-rutinoside and quercetin-3-O-rutinoside were the main flavonols present in M. sylvestris and S. nigra, respectively. The studied flowers could be selected for processing extracts with health-promoting properties or to be incorporated into functional beverages or products with bioactive properties related to oxidative stress.
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