NMR assignments of unusual flavonoids from the kino of Eucalyptus citriodora

Magn Reson Chem. 2007 Mar;45(3):262-4. doi: 10.1002/mrc.1929.

Abstract

Two unusual flavonoids, 3,5,4',5''-tetrahydroxy-7-methoxy-6-[1-(p-hydroxy-phenyl)ethyl]flavanone (1) and 3,5,7,4',5''-pentahydroxy-6-[1-(p-hydroxy-phenyl)ethyl] flavanone (2), were isolated from the kino of Eucalyptus citriodora. Structural elucidation of the new compounds were established on the basis of spectral data, particularly by the use of 1D NMR and several 2D shift-correlated NMR pulse sequences ((1)H, (1)H-COSY, HMQC, HMBC).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon Isotopes
  • Deuterium
  • Eucalyptus / chemistry*
  • Flavanones / chemistry*
  • Flavonoids / chemistry*
  • Flavonoids / isolation & purification
  • Magnetic Resonance Spectroscopy / methods*
  • Magnetic Resonance Spectroscopy / standards*
  • Molecular Conformation
  • Protons
  • Reference Standards
  • Sensitivity and Specificity
  • Stereoisomerism

Substances

  • 3,5,4',5''-tetrahydroxy-7-methoxy-6-(1-(4-hydroxyphenyl)ethyl)flavanone
  • 3,5,7,4',5''-pentahydroxy-6-(1-(4-hydroxyphenyl)ethyl)flavanone
  • Carbon Isotopes
  • Flavanones
  • Flavonoids
  • Protons
  • Deuterium