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. 2021 Dec 15;8:777214. doi: 10.3389/fnut.2021.777214

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Copyright © 2021 De'Nobili, Bernhardt, Basanta and Rojas.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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HPLC chromatograms were obtained from SP at 320 nm of wavelength for extractable phenolic compounds. Peaks: 1, O-caffeoylquinic acid; 2, O-caffeoylquinic acid isomer; 3, caffeoyl-dimethoxycinnamoylquinic acid; 4, caffeoyl-dimethoxycinnamoylquinic acid isomer; 5, dicaffeoylquinic acid (A). HPLC-DAD chromatogram (280 nm) of proanthocyanidin phloroglucinolysis breakdown products obtained from SP: 1, epicatechin extension units; 2, catechin terminal units; 3, epicatechin terminal units (B). HPLC chromatograms were obtained from SP at 320 nm of wavelength for esterified phenolic compounds. Peaks: 6, ferulic acid monomer; 7, ferulic acid dimer, 8, ferulic acid trimer (C).