New flavonoids and other constituents from Ouratea hexasperma (Ochnaceae)

Journal of the Brazilian Chemical Society

Núcleo de Pesquisa em Produtos Naturais, Rio de Janeiro, Brazil¹  Kaplan, Maria Auxiliadora C.¹  Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brazil¹  Carvalho, Mário G. de¹  Suzart, Luciano R.¹  Cavatti, Lorena C.¹ 

关键词: Ochnaceae;    Ouratea hexasperma;    glucopyranosyl-prenylflavonoids;    prenylflavanonol glucoside;    prenylflavone glucoside;    2;    4-dihydroxyphenylacetic acid;   

DOI  :  10.1590/S0103-50532008000700029

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Chromatographical fractionation of the methanol extract from the branches of Ouratea hexasperma (Ochnaceae) afforded two new flavonoids, 7-O-β-D-glucopyranosyl-6-(3-methylbut-2-enyl)-5,4'-dihydroxyflavanonol (6-β,β-dimethylallylaromadendrin-7-O-β-D-glucoside) and 7-O-β-D-glucopyranosyl-6-(3-methylbut-2-enyl)-3,5,4'-trihydroxyflavone (6-β,β-dimethylallylkaempferol-7-O-β-D-glucoside) besides a mixture of sitosterol and stigmasterol,lupeol, sitosterol-3-O-β-D-glycopyranoside and 2,4-dihydroxyphenylacetic acid. The structures were established by analysis of IR, ESI-MS, and NMR spectra of the natural substances, and those of the dimethyl ether and peracetyl-derivatives of the new flavone, as well as comparison with literature values.

【 授权许可】

Unknown