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Updated: Feb 1, 2026
A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes
Published on: June 10, 2022
Phenolic Isomers from Plantago catharinea Leaves: Isolation, ldentification, Quantification and in vitro Antioxidant
Abstract:
In this study we isolated two polyphenolic acids of m/z 639, called catharinol A and catharinol B, from Plantago catharinea L. (Plantaginaceae) leaves. Although presenting very similar structures, catharinol A showed higher antioxidant activity when compared with gallic acid and quercetin standards. These compounds are position isomers and present in their chemical structure the rare sugar D-allose. Molecules with similar constitution are known to have imnportant biological activities such as antitumor and immunosuppressive. These compounds were isolated by high-performance liquid chromatography HPLC) and characterized by mass spectrometry (FIA-ESI-IT-MS/MS) and nuclear magnetic resonance (NMR). This work is the first study on the chemical composition ofP. catharinea and encourages the production of Plantago species as a good source of bioactive molecules.
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