Acylated quercetagetin glycosides with antioxidant activity from Tagetes maxima
| Autor: | Irene Parejo, Francesc Viladomat, Jaume Bastida, Carles Codina |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Spectrometry
Mass Electrospray Ionization Magnetic Resonance Spectroscopy Antioxidant Free Radicals DPPH Acylation medicine.medical_treatment Radical Quercetagetin Flavonoid Plant Science Horticulture Biochemistry Flavones Tagetes Structure-Activity Relationship chemistry.chemical_compound Picrates medicine Organic chemistry Glycosides Molecular Biology chemistry.chemical_classification Molecular Structure biology Biphenyl Compounds Glycoside Free Radical Scavengers General Medicine Plant Components Aerial biology.organism_classification Hydrazines chemistry Chromones |
| Zdroj: | Phytochemistry. 66:2356-2362 |
| ISSN: | 0031-9422 |
| DOI: | 10.1016/j.phytochem.2005.07.004 |
| Popis: | The fractionation of a methanolic extract of Tagetes maxima guided for antioxidant activity resulted in the isolation of three acylated quercetagetin glycosides, quercetagetin-7-O-(6-O-caffeoyl-beta-D-glucopyranoside), quercetagetin-7-O-(6-O-p-coumaroyl-beta-D-glucopyranoside) and quercetagetin-7-O-(6-O-galloyl-beta-D-glucopyranoside), as well as four known flavonoid glycosides. The structural elucidation was accomplished by spectroscopic methods (ESI-MS/MS and NMR). The antioxidant activity of fractions and isolated compounds was determined by checking the scavenging activity against three different radicals: 2,2-diphenyl-1-picrylhydrazyl free radical (DPPH*), hydroxyl (*OH), and superoxide (O2*-). The three isolated compounds exhibited a high radical scavenging activity in comparison with reference compounds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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