Showing papers on "Isovitexin published in 1999"
TL;DR: Dehulling the grain by using different temperature regimes resulted in drastic reductions of the total flavonoid concentration in the grain (by 75% of the control) and smaller but significant reduction in the hulls.
Abstract: Six flavonoids have been isolated and identified in buckwheat grain. These are rutin, orientin, vitexin, quercetin, isovitexin, and isoorientin. Rutin and isovitexin are the only flavonoid components of buckwheat seeds while hulls contain all six identified compounds. The total flavonoid concentration in the seeds was 18.8 and in the hulls 74 mg/100 g of dry matter. Dehulling the grain by using different temperature regimes resulted in drastic reductions of the total flavonoid concentration in the grain (by 75% of the control) and smaller but significant (15-20%) reduction in the hulls.
232 citations
TL;DR: In this article, a chemical investigation on the H2O-soluble constituents from the leaf of Phoebe formosana was conducted, which led to the characterization of many compounds including two C-glycosylflavone -vitexin (1), isovitexins (2); six O-glyco-lflavonol -quercetin 3-O-galactoside (3), quercetins 3-α-L-arabinopyranoside (4), quERCetin3-O
Abstract: A chemical investigation on the H2O-soluble constituents from the leaf of Phoebe formosana. led to the characterization often compounds including two C-glycosylflavone — vitexin (1), isovitexin (2); six O-glycosylflavonol — quercetin 3-O-galactoside (3), quercetin 3-O-α-L-arabinopyranoside (4), kaempferol 3-O-α-L-arabinofuranoside (5), kaempferol 3-O-α-L-rhamnoside (6), kaempferol 3-O-β-D-xylopyranoside (7); one dihydroflavonol -(+)-dihydroquercetin (8) and two nucleosides -adenosine (9), and adenine (10). Their structures were determined on the basis of spectral analysis.
25 citations
TL;DR: Apigenin, luteolin, apigenin-7- O -s-D-rutinopyranoside, lutesin, isoorientin, aesculetin,Aesculin, chlorogenic acid and caffeic acid have been isolated from the aerial parts of O. sanctum L.
Abstract: Apigenin, luteolin, apigenin-7- O -s-D-rutinopyranoside, luteolin-7- O -s-D-glucopyranoside, vicenin-2, vitexin, isovitexin, orientin, isoorientin, aesculetin, aesculin, chlorogenic acid and caffeic acid have been isolated from the aerial parts of O. sanctum L.
15 citations
Journal Article•
TL;DR: In this paper, the authors reported the isolation of vitexin and its isomeric compound (isovitexins) from Herba Cajani by the methods of solvent, crystal and column chromatography.
Abstract: This paper reports the isolation of vitexin and its isomeric compound (isovitexin) from Herba Cajani by the methods of solvent, crystal and column chromatography. Their structures have been determined by infrared spectroscopy, ultraviolet spectroscopy, mass spectroscopy, 13 C nuclear magnetic resonance spectroscopy and 1 H nuclear magnetic resonance spectroscopy. And isovitexin was first separated from Herba Cajani.
1 citations