Journal ArticleDOI
13C NMR spectra of polymethoxy‐ and methylenedioxyflavonols
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TLDR
The 13C NMR spectra of 20 polymethoxy-and/or methylenedioxyflavonols are reported in this paper, where assignments have been made by examination of fully coupled spectra.Abstract:
The 13C NMR spectra of 20 polymethoxy- and/or methylenedioxyflavonols are reported In key cases assignments have been made by examination of fully coupled spectraread more
Citations
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Book ChapterDOI
Carbon-13 NMR Spectroscopy of Flavonoids
TL;DR: For example, Ternai et al. as mentioned in this paper used Fourier Transform (FT) NMR spectroscopy of 13C-NMR for the structure elucidation of flavonoids and their glycosides.
Journal ArticleDOI
Structural Requirements of Flavonoids and Related Compounds for Aldose Reductase Inhibitory Activity
TL;DR: The methanolic extracts of several natural medicines and medicinal foodstuffs were found to show an inhibitory effect on rat lens aldose reductase, and various flavonoids and related compounds were examined to clarify the structural requirements of flavonoidal activity.
Journal ArticleDOI
13C NMR spectral assignment of the A-ring of polyoxygenated flavones
Tokunaru Horie,Yoshizumi Ohtsuru,Kenichi Shibata,Kazuyo Yamashita,Masao Tsukayama,Yasuhiko Kawamura +5 more
TL;DR: In this paper, the 13 C NMR spectra of polyhydroxyflavones were systematically examined by using about 70 examples which have a 4methoxyphenyl B-ring.
Journal ArticleDOI
Effects of flavonoids on cell proliferation and caspase activation in a human colonic cell line HT29: an SAR study.
Jean-Baptiste Daskiewicz,Flore Depeint,Lionel Viornery,Christine Bayet,Geraldine Comte-Sarrazin,Gilles Comte,Jennifer M. Gee,Ian T. Johnson,Karine Ndjoko,Kurt Hostettmann,Denis Barron +10 more
TL;DR: Most compounds that significantly reduced cell survival also increased caspase activity, suggesting that at least part of their antiproliferative activity might be attributable to an apoptotic response.
Journal ArticleDOI
A weakly antimalarial biflavanone from Rhus retinorrhoea.
Mohamed S. Ahmed,Ahmed M. Galal,Samir A. Ross,Daneel Ferreira,Mahmoud A. ElSohly,Abdel-Rahim S. Ibrahim,Jaber S. Mossa,Farouk S. El-Feraly +7 more
TL;DR: 7-O-Methylnaringenin showed weak antimicrobial activity against Candida albicans, C. krusei, Staphylococcus aureus, Mycobacterium smegmatis, M. intracellulare, and M. xenopi with MIC approximately 100 microg/ml.
References
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Journal ArticleDOI
13C NMR of flavonoids—II : Flavonoids other then flavone and flavonol aglycones
K.R. Markham,B. Ternai +1 more
TL;DR: In this paper, the 13-C NMR spectra for a number of dihydroflavones, dihydronols, flavonols, chalcones, and several glycosides in DMSO-d 6 solvent are reported and analysed.
Journal ArticleDOI
Carbon-13 NMR studies of flavonoids—I
B. Ternai,K.R. Markham +1 more
TL;DR: In this article, the C-NMR spectra of hydroxylated flavones and flavonols are presented for the first time and the accepted substitution additivity rules have been shown to hold for these compounds except in cases where structural modifications involve the C 3, 4 and 5 positions.
Journal ArticleDOI
Carbon-13 nuclear magnetic resonance spectroscopy of flavonoid and isoflavonoid compounds
Ernest Wenkert,Hugo E. Gottlieb +1 more
TL;DR: In this article, the 13 C NMR spectra of 15 flavonoid and 9 isoflavonoid substances of various ring C oxidiation states were analyzed and their carbon shifts assigned.
Journal ArticleDOI
13C n.m.r. spectra of quercetin and rutin
J. Y. Lallemand,M. Duteil +1 more
TL;DR: In this article, the noise-decoupled and gated decoupled 13C n.m.r spectra of quercetin and rutin are studied and assignments are proposed.
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