Journal of the Brazilian Chemical Society | |
New flavonoids and other constituents from Ouratea hexasperma (Ochnaceae) | |
Mário G. De Carvalho2  Luciano R. Suzart2  Lorena C. Cavatti2  Maria Auxiliadora C. Kaplan1  | |
[1] ,Universidade Federal Rural do Rio de Janeiro Departamento de Química Rio de Janeiro RJ ,Brazil | |
关键词: Ochnaceae; Ouratea hexasperma; glucopyranosyl-prenylflavonoids; prenylflavanonol glucoside; prenylflavone glucoside; 2; 4-dihydroxyphenylacetic acid; | |
DOI : 10.1590/S0103-50532008000700029 | |
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】
CC BY
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