SciELO - Scientific Electronic Library Online

vol.20 issue6Acanthoic acid and other constituents from the stem of Annona amazonica (Annonaceae)Biological activities of lignoids from Amazon Myristicaceae species: Virola michelii, V. mollissima, V. pavonis and Iryanthera juruensis author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Journal of the Brazilian Chemical Society

Print version ISSN 0103-5053On-line version ISSN 1678-4790


LOPES, Gisely C.; ROCHA, Juliana C. B.; ALMEIDA, Glalber C. de  and  MELLO, João C. P. de. Condensed Tannins from the bark of Guazuma ulmifolia Lam. (Sterculiaceae). J. Braz. Chem. Soc. [online]. 2009, vol.20, n.6, pp.1103-1109. ISSN 1678-4790.

From the bark of Guazuma ulmifolia Lam. (Sterculiaceae), nine compounds were isolated and identified: ent-catechin, epicatechin, ent-gallocatechin, epigallocatechin, epiafzelechin-(4β→8)-epicatechin, epicatechin-(4β→8)-catechin (procyanidin B1), epicatechin-(4β→8)-epicatechin (procyanidin B2), epicatechin-(4β→8)-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 µL and the wavelength was 210 nm.

Keywords : Guazuma ulmifolia; condensed tannins; HPLC; fingerprint.

        · abstract in Portuguese     · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License