Chemotaxonomic relevance of cardenolides in Urginea fugax |
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Authors: | Krenn Liselotte Hüfner Antje Kastenhuber Anna Speta Franz |
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Institution: | Institute of Pharmacognosy, University of Vienna, PharmaCenterVienna, Althanstrasse 14, A-1090 Vienna, Austria. liselotte.krenn@univie.ac.at |
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Abstract: | In a chemotaxonomic approach the investigation of a methanolic extract of bulbs of Urginea fugax (MORIS) STEINH. resulted in the detection of several cardenolides. The structure of a novel compound, named fugaxin (1), was established as 12alpha,14beta-dihydroxy-2alpha,3beta-(tetrahydro-3',5'-dihydroxy-4'-methoxy-6'-methyl-2H-pyran-2',4'-diylbisoxy)-card-4,20-dienolide by extensive NMR spectroscopic studies including 2D-NMR techniques (COSY, HSQC, HMQC) and selective 1D experiments (NOE, TOCSY) as well as HR-ESI-MS. The chemotaxonomic relevance of the occurrence of cardenolides in the genus Urginea is discussed. |
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Keywords: | Urginea fugax Urgineoideae Cardenolides 12α 14β-Dihydroxy-2α 3β-(tetrahydro-3′ 5′-dihydroxy-4′-methoxy-6′-methyl-2H-pyran-2′ 4′-diylbisoxy)-card-4 20-dienolide Fugaxin Chemotaxonomy |
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