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. 2017 Jul 27;7(3):37. doi: 10.3390/metabo7030037

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© 2017 by the authors.

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/).

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Typical gas-chromatography-mass spectrometry (GC-MS) chromatograms obtained from the analysis of beer (a), wine (b), whisky (c) and vinegar (d) ethyl acetate extracts. D = D₄-methanol, E = ethanol, W = acetonitrile (from wash solvent), A = acetic acid, IA = isoamyl alcohol, BD = 2,3-butanediol and AT = acetoin.