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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 (http://creativecommons.org/licenses/by/4.0/).
Ex post quality control of mass spectrum of 2TMS cis-4-hydroxymellein using the QC_Soft application. Mass peaks marked with red circles are associated to fragments created, by the software algorithm, from the hypothesized structure.