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. 2020 Dec 30;11(1):21. doi: 10.3390/metabo11010021

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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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Principal component analysis (PCA) score (a) and loading (b) plots of the volatile organic compound (VOC) profiles of the Curcuma amada and C. longa samples. Principal components one and two (PC1, PC2) represent the first two principal components that account for a total of 46.3% of the variance. Loading plot indicated some representative compounds contributed to separation of the analyzed Curcuma species. Indicated compound IDs and names: [ID071], β-myrcene; [ID089], o-cymol; [ID099], 1,8-cineole; [ID152], camphor; [ID247], β-elemene; [ID250], α-funebrene; [ID257], α-santalene; [ID260], trans-α-bergamotene; [ID261], teresantalol; [ID270], α-santalol; [ID275], γ-curcumene; [ID276], cuparene; [ID280], α-zingiberene; [ID283], β-bisabolene; [ID289], β-sesquiphellandrene; [ID349], ar-turmerone; [ID357], (Z)-γ-atlantone.