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. 2020 Feb 11;9(2):173. doi: 10.3390/foods9020173

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© 2020 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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(a) The PCA score plot for MD2 pineapple peel, crown and core extracted with 0, 50 and 100% ethanol ratio. (b) The PCA loading plot. See Table 1 for the assignments of metabolites.

(a) The PCA score plot for MD2 pineapple peel, crown and core extracted with 0, 50 and 100% ethanol ratio. (b) The PCA loading plot. See Table 1 for the assignments of metabolites.