Chemical constituents and antioxidant activity from leaves extracts of Terminalia fagifolia Mart. et Zucc

Quimica nova

Rinaldo, Daniel¹  Vieira Júnior, Gerardo Magela¹  Vilegas, Wagner¹  Ayres, Mariane Cruz Costa²  Chaves, Mariana H.² 

[1] Universidade Estadual Paulista Júlio de Mesquita Filho, Araraquara, Brasil;Universidade Federal do Piauí, Teresina, Brasil

关键词: Terminalia fagifolia;    DPPH;    antioxidant activity.;   

DOI  :  10.1590/S0100-40422009000600028

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Phytochemical investigationof 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 thesecompounds were identified by 1H and 13C NMR spectral analysisand comparison with literature data. Absolute configuration of the catechinwas determinate by circular dichroism. Antioxidant activity (EC50),evaluated by 2,2-diphenyl-1-picrylhidrazyl (DPPH) assay system, decreased inthe order: (+)-catechin > hydroalcoholic fraction > CP-13 > aqueousfraction > EtOH extract.

【 授权许可】

CC BY