New Biflavonoid and Other Constituents from Luxemburgia nobilis (EICHL)
Chromatographic fractionation of the organic extracts from the leaves and branches of Luxemburgia nobilis (Ochnaceae) afforded sitosterol, sitosterol-3-O-betaD-glucopyranoside, friedelin, friedelinol, a mixture of triterpenes lupeol, alpha-amyrin and beta-amyrin, rutin, epicatechin, a mixture of two chalcones, 2,4,3',4'-tetrahydroxychalcone and 2,4,4'-trihydroxychalcone, two known biflavones, amentoflavone and robustaflavone along with a new biflavonoid, 5,7,4'-trihydroxyflavone-(3'-O-4'")-5",7"-dihydroxyflavanone. The structures were established from spectral data, including 2D-NMR experiment... Mehr ...
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| Dokumenttyp: | Artikel |
| Erscheinungsdatum: | 2002 |
| Reihe/Periodikum: | Journal of the Brazilian Chemical Society, Vol 13, Iss 1, Pp 119-123 (2002) |
| Verlag/Hrsg.: |
Sociedade Brasileira de Química
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| Schlagwörter: | Luxemburgia nobilis / Ochnaceae / flavonoids / steroids / triterpenes / Chemistry / QD1-999 |
| Sprache: | Englisch |
| Permalink: | https://search.fid-benelux.de/Record/base-27524179 |
| Datenquelle: | BASE; Originalkatalog |
| Powered By: | BASE |
| Link(s) : | https://doaj.org/article/75dd5573395d42c4803b4334651aae94 |
Chromatographic fractionation of the organic extracts from the leaves and branches of Luxemburgia nobilis (Ochnaceae) afforded sitosterol, sitosterol-3-O-betaD-glucopyranoside, friedelin, friedelinol, a mixture of triterpenes lupeol, alpha-amyrin and beta-amyrin, rutin, epicatechin, a mixture of two chalcones, 2,4,3',4'-tetrahydroxychalcone and 2,4,4'-trihydroxychalcone, two known biflavones, amentoflavone and robustaflavone along with a new biflavonoid, 5,7,4'-trihydroxyflavone-(3'-O-4'")-5",7"-dihydroxyflavanone. The structures were established from spectral data, including 2D-NMR experiments of the natural substances and of the acetyl and methyl ether derivatives of the new biflavone.