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Three dibenzoylmethane derivatives from Lonchocarpus species

1997; Elsevier BV; Volume: 46; Issue: 6 Linguagem: Inglês

10.1016/s0031-9422(97)00340-3

1873-3700

Aderbal F. Magalhães, Ana Maria A. Tozzi, Eva G. Magalhães, Ivani S. Blanco, Marisa Alves Nogueira Diaz,

Phytochemistry and Biological Activities

Three new dibenzoylmethane derivatives were isolated from petrol extracts of the roots of Lonchocarpus latifolius and L. muehlbergianus. Molecular structures were determined from spectroscopic data, especially NMR techniques. An alkyl group bonded to the central carbon (C-8) of a natural dibenzoylmethane, had not been found before. Spectral data analysis suggested a preponderance of the respective diketotautomers.