The Journal of Argentine Chemical Society
On-line version ISSN 1852-1428
ALARCON, S. R. et al. Flavonoids from Gutierrezia Repens (Asteraceae). J. Argent. Chem. Soc. [online]. 2007, vol.95, n.1-2, pp. 20-24. ISSN 1852-1428.
7,3'-dimethylquercetin 1, 7,3,3'-trimethylquercetin 2, 7,3,4'-trimethylquercetin 3 and quercetin 4 were isolated from aerial parts of Gutierrezia repens (Asteraceae). The structures of 1, 2 and 3 were determined mainly on the basis of 2D NMR data. Their 1H NMR spectra in CDCl3 and Me2CO-d6 are compared and discussed. The 13C NMR spectra of these compounds are given here for the first time.
Keywords : Gutierrezia repens; Asteraceae; Photochemistry; Flavonoids.