Constituintes químicos e atividade antioxidante de extratos das folhas de Terminalia fagifolia Mart. et Zucc

Química Nova

Mariane Cruz Costa Ayres²  Mariana H. Chaves²  Daniel Rinaldo¹  Wagner Vilegas¹  Gerardo Magela Vieira Júnior¹ 

[1] ,Universidade Federal do Piauí Departamento de Química Teresina PI ,Brasil

关键词: Terminalia fagifolia;    DPPH;    antioxidant activity;   

DOI  :  10.1590/S0100-40422009000600028

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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