<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Flavonoids obtained from <italic>Sideritis</italic> species (<italic>Lamiaceae</italic>), <italic>S. raeseri</italic> and <italic>S. scardica</italic>, grown in Macedonia were studied. Qualitative and quantitative analyses of the flavonoid aglycones were performed using high-performance liquid chromatography (HPLC) with a UV diode array detector. Extracts were prepared by acid hydrolysis in acetone, re-extraction in ethyl acetate and evaporation to dryness; the residue dissolved in methanol was subjected to HPLC analysis.Isoscutellarein, chryseriol and apigenin were identified in the extracts. Also, a 4'-methyl ether derivative of isoscutellarein was found, together with hypolaetin and its methyl ether derivative, which were identified according to previously isolated glycosides and literature data. Quantitation was performed using calibration with apigenin.According to this screening analysis, the samples of the genus <italic>Sideritis</italic> from Macedonia are rich in polyhydroxy flavones and analogous with the previously studied Mediterranean <italic>Sideritis</italic> species from the Ibero-North African and Greek <italic>Sideritis</italic> species with respect to the presence of 8-OH flavones and their derivatives.</abstract>

Flavonoids obtained from Sideritis species (Lamiaceae), S. raeseri and S. scardica, grown in Macedonia were studied. Qualitative and quantitative analyses of the flavonoid aglycones were performed using high-performance liquid chromatography (HPLC) with a UV diode array detector. Extracts were prepared by acid hydrolysis in acetone, re-extraction in ethyl acetate and evaporation to dryness; the residue dissolved in methanol was subjected to HPLC analysis.Isoscutellarein, chryseriol and apigenin were identified in the extracts. Also, a 4'-methyl ether derivative of isoscutellarein was found, together with hypolaetin and its methyl ether derivative, which were identified according to previously isolated glycosides and literature data. Quantitation was performed using calibration with apigenin.According to this screening analysis, the samples of the genus Sideritis from Macedonia are rich in polyhydroxy flavones and analogous with the previously studied Mediterranean Sideritis species from the Ibero-North African and Greek Sideritis species with respect to the presence of 8-OH flavones and their derivatives.

Assay of flavonoid aglycones from the species of genus <italic>Sideritis (Lamiaceae)</italic> from Macedonia with HPLC-UV DAD

Institute of Chemistry, Faculty of Science, Sts. Cyril and Methodius University, Skopje, Republic of Macedonia

Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria

Acta Pharmaceutica

Assay of flavonoid aglycones from the species of genus  from Macedonia with HPLC-UV DAD

Flavonoids obtained from Sideritis species (Lamiaceae), S. raeseri and S. scardica, grown in Macedonia were studied. Qualitative and quantitative analyses of...

Assay of flavonoid aglycones from the species of genus Sideritis (Lamiaceae) from Macedonia with HPLC-UV DAD

Published Online: Sep 18, 2007

Page range: 371 - 377

DOI: https://doi.org/10.2478/v10007-007-0030-8

Keywords
flavonoidi, polihidroksiflavoni, HPLC-UV DAD

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