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Antioxidant galloylated flavonoids from Geranium tuberosum L. subsp tuberosum

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Author

  • Didem Sohretoglu
  • Mahmut Koray Sakar
  • Suna Atasayar Sabuncuoglu
  • Hilal Oezguenes
  • Olov Sterner

Summary, in English

Phytochemical investigations on the most active EtOAc extract led to the isolation of 9 flavonoids [quercetin (1), quercetin 3-O-beta-glucopyranoside (2), quercetin 3-O-beta-galactopyranoside (3), quercetin 3-O-(2 ''-O-galloyl)-beta-glucopyranoside (4), quercetin 3-O-(2 ''-O-galloyl)-beta-galactopyranoside (5), quercetin 3-O-(6 ''-O-galloyl)-beta-glucopyranoside (6), quercetin 3-O-(6 ''-O-galloyl)-beta-galactopyranoside (7), quercetin-3-O-alpha-arabinofuranoside (8), and quercetin-3-O-alpha-rhamnopyranosyl-(1 -> 6)-beta-glucopyranoside (9)] and a simple phenolic compound (methyl gallate) (10). The structures of the compounds were elucidated by 1- and 2-dimensional NMR techniques (H-1, C-13, COSY, HMBC, and HMQC) and ESI-TOF-MS spectrometry. H2O2-induced lipid peroxidation inhibitor effects in human red blood cells of different extracts of G. tuberosum L. subsp. tuberosum aerial parts were also investigated. All the compounds tested showed antioxidant activity.

Publishing year

2009

Language

English

Pages

685-692

Publication/Series

Turkish Journal of Chemistry

Volume

33

Issue

5

Document type

Journal article

Publisher

Scientific Technical Research Council Turkey-Tubitak

Topic

  • Organic Chemistry

Keywords

  • antioxidant
  • gallate
  • methyl
  • flavonoids
  • G. tuberosum L. subsp tuberosum
  • flavonol gallate

Status

Published

ISBN/ISSN/Other

  • ISSN: 1300-0527