Constituintes químicos e atividade antioxidante de extratos das folhas de Terminalia fagifolia Mart. et Zucc
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Data
2009-01-01
Autores
Ayres, Mariane Cruz Costa
Chaves, Mariana H.
Rinaldo, Daniel [UNESP]
Vilegas, Wagner [UNESP]
Vieira Júnior, Gerardo Magela [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Resumo
Phytochemical investigation of ethanolic leaves extracts of T. fagifolia led to the isolation of (+)-catechin, sitosterol-3-O-β-D-glucopyranoside, α- and β-tocopherol, a mixture of lupeol, α- and β-amyrin, sitosterol and a mixture of glicosid flavonoids (CP-13). The structures of these compounds were identified by ¹H and 13C NMR spectral analysis and comparison with literature data. Absolute configuration of the catechin was determinate by circular dichroism. Antioxidant activity (EC50), evaluated by 2,2-diphenyl-1-picrylhidrazyl (DPPH) assay system, decreased in the order: (+)-catechin > hydroalcoholic fraction > CP-13 > aqueous fraction > EtOH extract.
Descrição
Palavras-chave
Terminalia fagifolia, DPPH, antioxidant activity
Como citar
Química Nova. Sociedade Brasileira de Química, v. 32, n. 6, p. 1509-1512, 2009.