Abstract
A comprehensive study of bioactive compounds was carried out in the leaves of the main Berberis species growing in Chile (Berberis microphylla, Berberis darwinii, Berberis empetrifolia, Berberis trigona, and the introduced Berberis vulgaris). We identified 117 compounds, by a detailed analysis of each molecule, including phenolic acids, alkaloids, flavonols, and other compounds, using high-performance liquid chromatography and high-resolution mass spectrometry. Quantitative analysis of main compound was also included for all species. Hydroxycinnamic acid derivatives were the main compounds in all the studied leaves, with the highest concentration in Berberis microphylla. Quercetin derivatives were the most relevant flavonols in all species, except in Berberis vulgaris, in which isorhamnetin-3-rutinoside was the most concentrated. The fatty acid profile, determined by gas chromatography mass spectrometry revealed the presence of linoleic and linolenic acids in all species studied. Berberis vulgaris showed higher levels of these fatty acids. The antioxidant capacity, explored by three in vitro methods, showed high values for all studied Berberis species. The obtained levels are higher than those of other prominent foods. The findings will inform novel approaches for the valorization of these leaves as natural food or ingredient.
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