Flavonoids and other substances from Lippia sidoides and their antioxidant activities

Química Nova

Braz-Filho, Raimundo¹  Almeida, Macia Cleane S. de¹  Machado, Luciana L.¹  Oliveira, Maria Conceição F. de¹  Universidade Federal Rural do Rio de Janeiro, Campos dos Goytacazes, Brasil¹  Lemos, Telma L. G.¹  Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro¹  Matos, Marcos C. de¹  Universidade Estadual do Norte Fluminense¹  Souza, Luciana Gregório da S.¹  Alves, Leonardo A.¹  Universidade Federal do Ceará, Fortaleza, Brasil¹ 

关键词: Lippia;    Verbenaceae;    chalcones.;   

DOI  :  10.1590/S0100-40422010000900011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The chemical investigation of the ethanol extracts of stems, roots and leaves of Lippia sidoides led to the isolation of: steroid β-sitosterol, naphthoquinone tecomaquinone, monoterpene carvacrol, flavonoid 4',5,7-trihydroxyflavanone (naringenin), 3',4',5,7-tetrahydroxyflavanone and 4',5,7-trihydroxy-6-methoxyflavone flavonoids mixture, and 3,4,4',6'-tetrahydroxydihydrochalcone-2'-O-β-D-glucopyranoside and 4,4',6'-trihydroxydihydrochalcone-2'-O- β-D-glucopyranoside dihydrochalcones mixture. Their structures were characterized on the basis of spectral data, mainly 1H and 13C NMR (1D and 2D) and mass spectra. The ethanol extract and isolated compounds were evaluated for their antioxidative properties using the method of inhibition of free radical DPPH (2,2-diphenyl-1-picrylhydrazyl).

【 授权许可】

Unknown