Resumo

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.

Palavras-chave : Gutierrezia repens; Asteraceae; Photochemistry; Flavonoids.