Three dibenzoylmethane derivatives from Lonchocarpus species

Article abstract of DOI:10.1016/S0031-9422(97)00340-3

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.