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. 2020 May 25;25(10):2452. doi: 10.3390/molecules25102452

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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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Scores (A) and loadings (B) plots of the first two principal components (PCs). EV indicates the explained variance. Score plot (A) showed the presence of two clusters, a first cluster indicated the Calamintha Nepeta (CNEO) samples, the second one Foeniculum vulgare (FVEO) and Ridolfia Segetum (RSEO) samples. In the plot sample 32 seems to be the outlier. The first two PCs in loading plot (B) highlight that estragole, o-cymene, alpha-pinene, alpha-phellandrene and pulegone could be the most important chemical constituents among all the tested EOs.