Brucea antidysenterica J. F. Mill. (Simaroubaceae) is a well known shrub fromrnthe bark of the plant many quassinoids including the antileukemic compounds bruceantin,rnwhich was in phase II clinical trial by the National Cancer Institute (USA).rnIn this work it was possible to isolate four compounds from the seeds: two glycosidicrnquassinoids (BA5 and BA6), one alkaloid (BA2) and one flavonoid (BA7B). Theirrnstructures were determined by spectral measurements and comparison with the previousrnwork.