Condensed Tannins from the bark of Guazuma ulmifolia Lam. (Sterculiaceae)

Journal of the Brazilian Chemical Society

Gisely C. Lopes²  Juliana C. B. Rocha²  Glalber C. De Almeida¹  João C. P. De Mello² 

[1] ,Universidade Estadual de MaringáMaringá PR ,Brazil

关键词: Guazuma ulmifolia;    condensed tannins;    HPLC;    fingerprint;   

DOI  :  10.1590/S0103-50532009000600016

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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