Antioxidant activity of coumarins and flavonols from the resinous exudate of Haplopappus multifolius

Author	dc.contributor.author	Torres, René
Author	dc.contributor.author	Faini, Francesca	es_CL
Author	dc.contributor.author	Modak, Brenda	es_CL
Author	dc.contributor.author	Zúñiga Urbina, Francisco	es_CL
Author	dc.contributor.author	Labbé, Cecilia	es_CL
Author	dc.contributor.author	Guerrero, Juan	es_CL
Admission date	dc.date.accessioned	2009-06-22T11:12:37Z
Available date	dc.date.available	2009-06-22T11:12:37Z
Publication date	dc.date.issued	2006-05
Cita de ítem	dc.identifier.citation	PHYTOCHEMISTRY Volume: 67 Issue: 10 Pages: 984-987 Published: MAY 2006	en
Identifier	dc.identifier.issn	0031-9422
Identifier	dc.identifier.uri	https://repositorio.uchile.cl/handle/2250/118879
Abstract	dc.description.abstract	The antioxidant activity of eight coumarins and two flavonols isolated from Haplopappus multifolius was studied with the DPPH radical method. Results show that a high concentration of phenolic coumarins and the presence of quercetin and rhamnetin in the exudates could account for the protection of the plant against oxidative stress. Structures for the coumarins 6-hydroxy-7-[(EE)-3',7'-dimethyl-2',4',7'-octatrienyloxy] coumarin and 7-[(E)-3'-methyl-4'-hydroxy-2'-butenyloxy] coumarin are proposed on the basis of spectroscopic evidence.	en
Lenguage	dc.language.iso	en	en
Publisher	dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
Keywords	dc.subject	Haplopappus multifolius	en
Título	dc.title	Antioxidant activity of coumarins and flavonols from the resinous exudate of Haplopappus multifolius	en
Document type	dc.type	Artículo de revista