%0 Journal Article %T Steroids and flavonoids of Porcelia macrocarpa %A Chaves %A Mariana H. %A Roque %A Nidia F. %A Ayres %A Mariane C. Costa %J Journal of the Brazilian Chemical Society %D 2004 %I Sociedade Brasileira de Qu¨Şmica, SBQ %R 10.1590/S0103-50532004000400026 %X 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. %K porcelia macrocarpa %K annonaceae %K steroids %K flavonoids. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532004000400026&lng=en&nrm=iso&tlng=en