The paper presents a multivariate analysis (principal component analysis, PCA) study on the chromatographic (GC-MS) data of the main biocompounds from Compositae family plants. The samples were flower, leaf, stem, and root from Matricaria chamomilla L. – chamomile, Achillea millefolim L. - yarrow, Cynara scolymus L. - artichoke, and Tussilago farfara L. – coltsfoot, and the extracts were obtained by SDE (steam-distillation/extraction) with yield up to 0.5%. The main biocompounds identified especially in flower samples were α-bisabolol, bisabolol-oxides A and B, and camazulene, with the exception of artichoke samples, where the main compounds were sesquiterpenes like β-cubebene. PCA analysis revealed the best similarity of the chamomile, yarrow, and coltsfoot samples, by using the chromatographic data of the sesquiterpenoids.
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