Abstract
Flavonoids have recently been found in large amounts in knotwood and stemwood of several tree species. Six flavonoids, two flavonoid glucosides, and one cinnamic acid derivative were isolated from Jack pine and European aspen knotwood and structurally characterised using GC-MS, HR-MS, and NMR spectroscopic analyses. Isolated compounds were further assessed on basis of their potency to inhibit lipid peroxidation and scavenge peroxyl radicals. All tested compounds possessed antioxidant properties close to that of the reference compound Trolox.
Zusammenfassung
Im Ast- und Stammholz verschiedener Baumarten hat man in jüngerer Zeit größere Mengen von Flavonoiden gefunden. Sechs Flavonoide, zwei Flavonoidglykoside und ein Zimtsäurederivat wurden aus dem Astholz von Jack Pine und Aspe isoliert und mittels GC-MS, HR-MS und NMR Spektralanalysen strukturell bestimmt. Ausgehend von deren Potential, eine Lipidperoxidation zu hemmen und Peroxylradikale abzufangen, wurden die isolierten Verbindungen weiter untersucht. Alle untersuchten Verbindungen verfügten über antioxidative Eigenschaften, die denjenigen der Referenzverbindung Trolox weitgehend entsprachen.
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Neacsu, M., Eklund, P.C., Sjöholm, R.E. et al. Antioxidant flavonoids from knotwood of Jack pine and European aspen . Holz Roh Werkst 65, 1–6 (2007). https://doi.org/10.1007/s00107-006-0121-0
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DOI: https://doi.org/10.1007/s00107-006-0121-0