ISOFLAVONES AND ALKALOIDS FROM THE STEM BARK AND SEEDS OF ERYTHRINA-SENEGALENSIS

Two new isoflavones, erysenegalensein L, ydroxy-8-(2'''-hydroxy-3'''-m ethylbut-3'''-enyl)-2 '',2 ''-dimethylpyrano [5 '',6 '',6,7] isoflavon e and erysenegalensein M, ydroxy-8-(2'''-hydroxy-3'''-methylbut-3'''-e nyl)-2 '',2 ''-dimethylpyrano [5 '', 6 '': 6, 7] isoflavone have been isolated from the stem bark of the Cameroonian medicinal plant Erythri na senegalensis. The seeds of this plant afforded erysodine, glucoerys odine and, hypaphorine. Their structures were determined by the usual spectroscopic methods, 2D NMR techniques and were confirmed by chemica l reactions.