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Journal of the Brazilian Chemical Society

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

Abstract

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.  https://doi.org/10.1590/S0103-50532009000600016.

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.

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