Flavonolignans from Hyparrhenia hirta |
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| Authors: | Bouaziz Mohamed Veitch Nigel C Grayer Renée J Simmonds Monique S J Damak Mohamed |
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| Institution: | Laboratoire de Chimie des Substances Naturelles, Faculté des Sciences de Sfax, BP 802, 3018 Sfax, Tunisia. |
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| Abstract: | Leaves of Hyparrhenia hirta yielded the rare diastereoisomeric flavonolignans tricin 4'-O-(erythro-beta-guaiacylglyceryl) ether and tricin 4'-O-(threo-beta-guaiacylglyceryl) ether together with their 7-O-glucosides, which are the first flavonolignan glycosides to be isolated as natural products. A complete set of (1)H and (13)C NMR resonance assignments obtained for both flavonolignan aglycones indicates the need for revision of data published previously for these compounds and for a reassessment of their original stereochemical designation. |
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| Keywords: | Hyparrhenia hirta Poaceae Flavonolignans Flavonolignan glycosides Tricin NMR spectroscopy |
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