Luxenchalcone, a new bichalcone and other constituents from Luxemburgia octandra

Journal of the Brazilian Chemical Society

Mário G. De Carvalho²  Cassia C. Fernandes Alves²  Kedma G. S. Da Silva²  Marcos N Eberlin¹  Alceni A Werle¹ 

[1] ,Universidade Federal Rural do Rio de Janeiro Departamento de Química Seropédica RJ ,Brazil

关键词: Luxemburgia octandra;    Ochnaceae;    flavonoids;    bichalcone;    terpenoids;   

DOI  :  10.1590/S0103-50532004000100023

来源: SciELO

【 摘 要 】

Chromatographic fractionation of leaves and branches extracts from Luxemburgia octandra (Ochnaceae) afforded isoliquiritigenin, 3'-hydroxyisoliquiritigenin, b-sitosterol, stigmasterol, lupeol, betulinic acid, the biflavonoid, 4',5,7-trihydroxyflavone-(3'®O®4'")-5",7"-dihydroxyflavanone and a new bichalcone 4,2',4'-trihydroxychalcone-(3®O®4")-2'",4'"-dihydroxychalcone (luxenchalcone). The structures were established from analysis of IR, MS and NMR spectral data, including 2D-NMR experiments of the natural substances and of the luxenchalcone methyl derivative.

【 授权许可】

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