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Abstract
Two new isoflavonoids 7,8,4′-trimethoxyisoflavone and 7,8,4′-trimethoxyisoflavanone and calycosin (7,3′-hydroxy-4′-methoxyisoflavone) were isolated from the wood of the leguminous tree Bowdichia virgilioides by usual chromatographic procedures. Besides these compounds the pterocarpane (−)-maackianin, isoliquiritigenin (4,2′,4′-trihydroxychalcone), and the hydrobenzylfurane derivative bowdenol were also obtained. The structures of these new compounds were determinated by MS and 1D and 2D NMR spectral analysis.
Acknowledgements
We are greatly indebted to Dr. Dionéia C. Rodrigues (USP-Rib. Preto, Brazil) for the bidimensional spectra and we also thank CNPq and FAPESB for the scholarships and grants.