Flavonoids from Tephrosia major. A New Prenyl-ß-hydroxychalcone

The roots and aerial parts of Tephrosia major Micheli, afforded a new prenylated-ß-hydroxychalcone, characterized as 2',6'-dihydroxy-3'-prenyl-4'-methoxy-ß-hydroxychalcone. In addition, seven prenylated flavonoids, two rotenoids, ß-sitosterol, stigmasterol, lupeol and quercetin were isolated. The structure of the new ß-hydroxy chalcone was established by spectroscopic methods, including 2D NMR experiments.