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Chemotaxonomy of Hypericum (Sect. Drosocarpium) species: Patterns in essential oil composition
University of Novi Sad, Faculty of Medicine, Department of Pharmacy, Serbia + University of Novi Sad, Faculty of Medicine, Serbia

emailblagoje.prpa@mf.uns.ac.rs
Abstract
When using herbal drugs for the production of any pharmaceutical dosage form, it is essential to select species listed in official documents such as the Pharmacopoeias. Sometimes it can be challenging to distinguish the designated species from other members of the same genus. Since microscopic and macroscopic identification methods are not always applicable, chemical characterization often remains the only reliable solution. Thus, the detection of chemical taxonomic markers and the application of a chemometric approach provide reliable species identification. The aim of this study was to demonstrate that such markers can be found within the genus Hypericum, specifically in sect. Drosocarpium. In this study, fifteen essential oil samples were obtained by hydrodistillation from five species belonging to Hypericum sect. Drosocarpium and subsequently analyzed using GC-MS. The yield of essential oils ranged from 0.01% to 0.1%. Among the dominant groups of compounds were oxidized aliphatic compounds and oxidized sesquiterpenes, which proved to be reliable chemotaxonomic indicators. Monoterpenes were not detected, most likely due to their high volatility caused by smaller molar mass and long-term storage prior to analysis. Multivariate statistical analyses, including principal component analysis (PCA) and UPGMA clustering, revealed distinct separation of H. barbatum and H. richeri, driven primarily by the presence of caryophyllene alcohol, n-dodecanoic acid, and n-dodecanol. These metabolites can thus be proposed as potential chemotaxonomic markers. Further studies are warranted to clarify the existence of specific chemotypes within these Balkan Hypericum species.

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article language: Serbian, English
document type: Lecture
DOI: 10.5937/arhfarm-61833
published in Portal: 28/10/2025
Creative Commons License 4.0

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