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dc.contributor.authorRadulović, Niko
dc.contributor.authorMladenović, Marko
dc.contributor.authorRistić, Milenko
dc.contributor.authorDekić, Vidoslav
dc.contributor.authorDekić, Biljana
dc.contributor.authorRistić, Novica
dc.date.accessioned2023-04-10T11:58:16Z
dc.date.available2023-04-10T11:58:16Z
dc.date.issued2019-12-10
dc.identifier.citationMinistry of Education, Science and Technological Development of Serbia [Project No. 172061]en_US
dc.identifier.urihttps://platon.pr.ac.rs/handle/123456789/1179
dc.description.abstractIntroduction: Minor plant constituents are difficult to identify due to the challenging isolation and acquiring of reliable spectral data. Essential oils abound in such minor constituents that might be of high importance for their (e.g. olfactory) properties. The presence of new minor constituents is usually inferred from gas chromatography mass spectrometry (GC-MS) analyses that provide only a mass spectrum and retention data, which are insufficient to allow a positive identification. Objective: To identify a minor unknown constituent of the essential oil of Achillea abrotanoides (Vis.) Vis. (Asteraceae). Methodology: The application of chemical transformations (oxidation and reduction) performed directly on crude essential-oil samples, followed by preparative chromatography and detailed spectral analysis, to identify a new longipinane ketone from the mentioned sample. Results: GC-MS analyses of the essential oil revealed, among other constituents, the presence of a known rare longipinane alcohol (α-longipinen-7β-ol) representing 2.5% of the total GC-peak areas, and a related unidentified oxygenated sesquiterpene (3.8%). Interpretation of their mass spectra led to an assumption that the unidentified one could represent α-longipinen-7-one. Oxidation of the entire essential-oil sample by pyridinium chlorochromate confirmed the assumed relationship among the compounds and gave a simplified enriched mixture containing the ketone (ca. 16%). A straightforward chromatographic separation of the ketone was followed by corroboration of its structure by nuclear magnetic resonance (NMR) (one- and two-dimensional), infrared (IR) and MS. Conclusions: The complementing use of chemical transformations of crude essential oils, chromatographic separations, and detailed spectral analysis could have a more general application in the identification of new natural products.en_US
dc.language.isoen_USen_US
dc.publisherWiley-VHCA AG, Zurich, Switzerlanden_US
dc.titleA new longipinane ketone from Achillea abrotanoides (Vis.) Vis.: chemical transformation of the essential oil enables the identification of a minor constituenten_US
dc.title.alternativePhytochemical Analysisen_US
dc.typeclanak-u-casopisuen_US
dc.description.versionpublishedVersionen_US
dc.identifier.doi10.1002/pca.2913
dc.citation.volume31
dc.citation.issue4
dc.citation.spage501
dc.citation.epage515
dc.subject.keywordsAchillea abrotanoidesen_US
dc.subject.keywordschemical transformationsen_US
dc.subject.keywordsessential oilen_US
dc.subject.keywordsGC-MSen_US
dc.subject.keywordsNMRen_US
dc.subject.keywordsstructure elucidationen_US
dc.subject.keywordsα-longipinen-7-oneen_US
dc.type.mCategoryM22en_US
dc.type.mCategoryopenAccessen_US
dc.type.mCategoryM22en_US
dc.type.mCategoryopenAccessen_US


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