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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
HPLC/DAD chromatograms, visualized at 330 nm of VF (black line) and BP (blue line) extracts from O. majorana. See text for further information and experimental details.