Journal of the Brazilian Chemical Society | |
New flavonoids and other constituents from Ouratea hexasperma (Ochnaceae) | |
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
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