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. 2015 Nov 2;20(11):19719–19734. doi: 10.3390/molecules201119652

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© 2015 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Correlation map of metabolites analyzed by ultrahigh performance liquid chromatography (UHPLC)-linear trap quadrupole-ion trap (LTQ-IT) mass spectrometry/mass spectrometry (MS/MS) with antioxidant and tyrosinase inhibition activities. Each square indicates r (Pearson’s correlation coefficient values for a pair of metabolites or antioxidant activity). The red color indicates positive (0 < r < 0.7) correlation and blue color indicates negative (−0.7 < r < 0) correlation. * The correlation coefficients of five metabolites are statistically significant at a level of 0.05 in bioactivities.