%0 Journal Article %T Prenylated Coumarins, Chalcone and New Cinnamic Acid and Dihydrocinnamic Acid Derivatives from Brosimum gaudichaudii %A Monteiro %A Ver£¿nica de F. F. %A Mathias %A Leda %A Vieira %A Ivo J. C. %A Schripsema %A Jan %A Braz-Filho %A Raimundo %J Journal of the Brazilian Chemical Society %D 2002 %I Sociedade Brasileira de Qu¨ªmica, SBQ %R 10.1590/S0103-50532002000200023 %X three new natural cinnamic acid and dihydrocinnamic acid derivatives were isolated from the roots of brosimum gaudichaudii, in addition to fourteen known substances (ten coumarins, one chalcone, b-sitosterol, 3b-o-b-d-glucopyranosylsitosterol and b-amyrin). the structures were established by spectral data, including analysis of 2d-nmr experiments and mass spectra. all aromatic compounds have 4-hydroxy-3-prenylcinnamic acid as a common precursor. the new substances are derived from a precursor of the coumarins, which through an o-methylation lost its ability to form the lactone ring. %K brosimum gaudichaudii %K moraceae %K coumarins %K chalcone %K cinnamic acid %K dihydrocinnamic acid derivatives. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532002000200023&lng=en&nrm=iso&tlng=en