Two new isoflavonoids from Bowdichia virgilioides

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.

Keywords:

• Bowdichia virgilioides
• Leguminosae
• Isoflavones
• Isoflavanone

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.