Steroids and flavonoids of Porcelia macrocarpa

three mixtures of steroids (1a+1b, 2a+2b and 3a+3b) and two flavonoid glycosides (4 and 5) were isolated from the ethanol extract of branches of porcelia macrocarpa (warm.) r. e. fries (annonaceae). the steroids stigmasta-4,25-dien-3-one (2a) and (22e)-stigmasta-4,22,25-trien-3-one (2b) are news. the structures were elucidated by nmr and ms data and comparison with literature data of model compounds.