Publicação: Chemical constituents and antioxidant activity from leaves extracts of terminalia fogiafolia mart. et zucc
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Soc Brasileira Quimica
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Acesso aberto
Resumo
CHEMICAL CONSTITUENTS and ANTIOXIDANT ACTIVITY FROM LEAVES EXTRACTS of Terminalia fagifolia Mart. et Zucc. Phytochemical investigation of ethanolic leaves extracts of T. fagifolia led to the isolation of (+)-catechin, sitosterol-3-O-beta-D-glucopyranoside, alpha- and beta-tocopherol, a mixture of lupeol, alpha- and beta-amyrin, sitosterol and a mixture of glicosid flavonoids (CP-13). The structures of these compounds were identified by (1)H and (13)C NMR spectral analysis and comparison with literature data. Absolute configuration of the catechin was determinate by circular dichroism. Antioxidant activity (EC(50)), evaluated by 2,2-diphenyl-1-picrylhidrazyl (DPPH) assay system, decreased in the order: (+)-catechin > hydroalcoholic fraction > CP-13 > aqueous fraction > EtOH extract.
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Terminalia fagifolia, DPPH, antioxidant activity
Idioma
Português
Como citar
Quimica Nova. São Paulo: Soc Brasileira Quimica, v. 32, n. 6, p. 1509-1512, 2009.
