Journal
PHYTOCHEMISTRY
Volume 60, Issue 5, Pages 515-520Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0031-9422(02)00145-0
Keywords
Hyparrhenia hirta; Poaceae; flavonolignans; flavonolignan glycosides; tricin; NMR spectroscopy
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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 H-1 and C-13 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. (C) 2002 Elsevier Science Ltd. All rights reserved.
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