NMR assignments of unusual flavonoids from the kino of Eucalyptus citriodora
2007
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 (1H, 1H-COSY, HMQC, HMBC). Copyright © 2007 John Wiley & Sons, Ltd.
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