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Antioxidant Activity of a New Aromatic Geranyl Derivative of the Resinous Exudates from Heliotropium glutinosum Phil.
Universidad de Santiago de Chile. Facultad de Química y Biología. Departamento de Ciencias del Ambiente. Casilla 40, correo 33, Santiago, Chile
Departamento de Química, Universidade da Beira Interior,. U. I&D Materiais Textêis e do Papel. 6201-001Covilhã, Portugal
Universidad de Chile. Facultad de Ciencias Forestales. Departamento de Silvicultura. Casilla 9206, Santiago, Chile
* Author to whom correspondence should be addressed.
Received: 5 April 2007; in revised form: 15 May 2007 / Accepted: 15 May 2007 / Published: 21 May 2007
Abstract: Heliotropium glutinosum Phil. (Heliotropiceae) is a resinous bush that grows at a height of 2000 m in Chañaral, Chile. From the resinous exudates of Heliotropium glutinosum Phil. a new aromatic geranyl derivative: 4-methoxy-3-[(2)-7’-methyl-3’-hydroxymethyl-2’,6’-octadienyl] phenol (1) and three flavonoids: 5,3'-dihydroxy-7,4'-dimethoxyflavanone (2), 5,4'-dihydroxy-7-methoxyflavanone (3) and 4'-acetyl-5-hydroxy-7-methoxyflavanone (4) were isolated and their structures were determined. Their antioxidant activity were evaluated using the bleaching of ABTS and DPPH derived cation radical methods and expressed in terms of FRE (fast reacting equivalents) and TRE (total reacting equivalents), where FRE is a good measure of the quick protection of a given compound against oxidants and TRE measures the degree of long-term protection of the antioxidant, or how effective it is against a strong oxidative stress.
Keywords: Heliotropium glutinosum; geranyl derivatives; flavonoids; antioxidant capacity; resinous exudates
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MDPI and ACS Style
Modak, B.; Rojas, M.; Torres, R.; Rodilla, J.; Luebert, F. Antioxidant Activity of a New Aromatic Geranyl Derivative of the Resinous Exudates from Heliotropium glutinosum Phil.. Molecules 2007, 12, 1057-1063.
Modak B, Rojas M, Torres R, Rodilla J, Luebert F. Antioxidant Activity of a New Aromatic Geranyl Derivative of the Resinous Exudates from Heliotropium glutinosum Phil.. Molecules. 2007; 12(5):1057-1063.
Modak, Brenda; Rojas, Macarena; Torres, René; Rodilla, Jesús; Luebert, Federico. 2007. "Antioxidant Activity of a New Aromatic Geranyl Derivative of the Resinous Exudates from Heliotropium glutinosum Phil.." Molecules 12, no. 5: 1057-1063.