Flavonolignans from Hyparrhenia hirta.
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.
Bouaziz
Mohamed
M
Laboratoire de Chimie des Substances Naturelles, Faculté des Sciences de Sfax, BP 802, 3018 Sfax, Tunisia.
Veitch
Nigel C
NC
Grayer
Renée J
RJ
Simmonds
Monique S J
MS
Damak
Mohamed
M
D005419:Flavonoids / Q000032:analysis* / Q000737:chemistry; D006027:Glycosides / Q000032:analysis* / Q000737:chemistry; D017705:Lignans / Q000032:analysis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D006109:Poaceae / Q000737:chemistry*; D013237:Stereoisomerism
D005419:Flavonoids; D006027:Glycosides; D017705:Lignans