Journal of the Brazilian Chemical Society
On-line version ISSN 1678-4790
ARAUJO, Renata M. de; LIMA, Mary Anne S. and SILVEIRA, Edilberto R.. Pterocarpans and a novel flavanone from harpalyce brasiliana roots. J. Braz. Chem. Soc. [online]. 2009, vol.20, n.5, pp. 935-938. ISSN 1678-4790. http://dx.doi.org/10.1590/S0103-50532009000500019.
The novel (-)-7,8,3',4'-trihydroxy-8-(3'',7''-dimethyl-octa-2'',6''-dienoyl)-flavanone was isolated from the EtOH extract from the roots of Harpalyce brasiliana (Leguminosae) together with the known pterocarpans (-)-2-geranyl-3-hydroxy-8,9-methylenedioxypterocarpan, harpalicin, medicarpin, maackiain and cabenegrins A-I and A-II. The isolated metabolites were characterized on the basis of spectroscopic data, mainly 1D and 2D NMR.
Keywords : Harpalyce brasiliana; flavanone; pterocarpans; NMR assignments.