%0 Journal Article
%T Condensed Tannins from the bark of Guazuma ulmifolia Lam. (Sterculiaceae)
%A Lopes
%A Gisely C.
%A Rocha
%A Juliana C. B.
%A Almeida
%A Glalber C. de
%A Mello
%A Jo£¿o C. P. de
%J Journal of the Brazilian Chemical Society
%D 2009
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50532009000600016
%X from the bark of guazuma ulmifolia lam. (sterculiaceae), nine compounds were isolated and identified: ent-catechin, epicatechin, ent-gallocatechin, epigallocatechin, epiafzelechin-(4¦Â¡ú8)-epicatechin, epicatechin-(4¦Â¡ú8)-catechin (procyanidin b1), epicatechin-(4¦Â¡ú8)-epicatechin (procyanidin b2), epicatechin-(4¦Â¡ú8)-epigallocatechin, and the new compound 4'-o-methyl-epiafzelechin. their structures were elucidated on the basis of spectral and literature data. hplc fingerprint analysis of the semipurified extract was performed on a c18 column, with a mixture of acetonitrile (0.05% trifluoroacetic acid):water (0.05% trifluoroacetic acid) (v/v) with a flow rate of 0.8 ml min-1. the sample injection volume was 100 ¦Ìl and the wavelength was 210 nm.
%K guazuma ulmifolia
%K condensed tannins
%K hplc
%K fingerprint.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532009000600016&lng=en&nrm=iso&tlng=en