Results
Title

Chemical Analysis of the Resinous Exudate Isolated from Heliotropium taltalense and Evaluation of the Antioxidant Activity of the Phenolics Components and the Resin in Homogeneous and Heterogeneous Systems.

Authors

Modak, Brenda; Rojas, Macarena; Torres, René

Abstract

H. taltalense (Phil.) Johnst. (Heliotropiaceae) is an endemic species of the northern coast of Chile that produces a resinous exudate that covers its foliar surface and stems. Its chemical composition was analyzed for the first time, and two aromatic geranyl derivatives: filifolinol and filifolinyl senecionate and three flavonoids - naringenin, 3-Omethylgalangin and 7-O-methyleriodictiol - were isolated. The antioxidant activity of the flavonoids and the resinous exudates was carried out by measuring the 1,1-diphenyl-2-picrylhydrazyl (DPPH) bleaching effect in ethanolic solution and in sodium dodecyl sulfate (SDS) micelles. The influence of the reaction medium was analyzed. The initial velocity reactions for the pure compounds and for the extract were higher in SDS media than in ethanolic solution. The velocity of reaction observed was interpreted in terms of the reaction medium environment in the micelle.

Subjects

CHILE; HELIOTROPIUM; PHYSIOLOGICAL effects of antioxidants; PHENOLS; FLAVONOIDS; EXUDATES & transudates; MICELLES; PLANT exudates; PLANT chemotaxonomy

Publication

Molecules, 2009, Vol 14, Issue 6, p1980

ISSN

1420-3049

Publication type

Academic Journal

DOI

10.3390/molecules14061980