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Antioxidant galloylated flavonoids from Geranium tuberosum L. subsp tuberosum

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

Abstract 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.


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


  • ISSN: 1300-0527
Olov Sterner
E-mail: olov [dot] sterner [at] science [dot] lu [dot] se


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