study of the chemical composition of the resinous exudate isolated from heliotropium sclerocarpum and evaluation of the antioxidant properties of the phenolic compounds and the resin研究树脂的化学成分渗出物隔绝heliotropium sclerocarpum和酚类化合物的抗氧化性能评估和树脂.pdf

Molecules 2009, 14, 4625-4633; doi:10.3390/molecule OPEN ACCESS molecules ISSN 1420-3049 /journal/molecules Communication Study of the Chemical Composition of the Resinous Exudate Isolated from Heliotropium Sclerocarpum and Evaluation of the Antioxidant Properties of the Phenolic Compounds and the Resin Brenda Modak 1,*, Melissa Salina 1, Jesús Rodilla 2 and René Torres 1 1 Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile; E-Mails: salinas.meli@ (M.S.); rene.torres@usach.cl (R.T.) 2 U. ID Materiais Textêis e do Papel, Departamento de Química, Universidade da Beira Interior, 6201-001 Covilhã, Portugal; E-Mail: rodilla@ubi.pt (J.R.) * Author to whom correspondence should be addressed; E-Mail: brenda.modak@usach.cl; Fax: +56-2-6812108. Received: 28 August 2009; in revised form: 31 October 2009 / Accepted: 11 November 2009 / Published: 12 November 2009 Abstract: Heliotropium sclerocarpum Phil. (Heliotropiaceae) is a resinous bush that grows in the Atacama of northern Chile. The chemical composition of its resinous exudate was analyzed for the first time. One aromatic geranyl derivative: filifolinol (1), one flavanone: naringenin (2) and a new type of 3-oxo-2-arylbenzofuran derivative 3 were isolated and their structures were determined. The antioxidant activity of the phenolic compounds and resin was evaluated using the bleaching of DPPH radical method and expressed as fas