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New spectral data of some flavonoids from Deguelia hatschbachii A.M.G. Azevedo

DOI: 10.1590/S0103-50532003000100022

Keywords: deguelia hatschbachii, leguminosae, 4-hydroxy-3-phenylcoumarins, flavanone.

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Abstract:

from the roots of deguelia hatschbachii, the known flavonoids scandenin (1), methyl robustate (2) and 4',5- dihydroxy-6-(3,3-dimethylalyll)-7-methoxy flavanone (3) were isolated and characterized by comparison of their spectroscopic data with those found in the literature. now the inclusion of 1d- and 2d-nmr and ms/ms data has allowed the complete assignment of all hydrogen and carbon chemical shifts in their nmr spectra, as well as the elucidation of the fragmentation pathways of 1-3 in the mass spectrometer.

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