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The scores on the extracted PCs ((A–D) for PC1, PC2, PC3, and PC4 respectively) and their loading plots ((E–H) of PC1, PC2, PC3, PC4, respectively), obtained from the principal component analysis (PCA) performed on the spectral data of the essential oils belonging to Mentha, Cymbopogon, and Lavandula genus, as well as Salvia rosmarinus and Thymus vulgaris species.
