NMR-based identification of the phenolic profile of fruits of Lycium barbarum (goji berries). Isolation and structural determination of a novel N-feruloyl tyramine dimer as the most abundant antioxidant polyphenol of goji berries

卷:194

Forino, Martino ; Tartaglione, Luciana ; Dell'Aversano, Carmela ; Ciminiello, Patrizia

Univ Naples Federico II

关键词: Lycium barbarum;    Goji berry;    Phenolics;    N-feruloyl tyramine dimer;    Antioxidant compounds;   

DOI  :  10.1016/j.foodchem.2015.08.129

学科分类：食品科学和技术

【 摘 要 】

Biological properties of fruits of Lycium barbarum (goji berries) have been ascribed to their high content of nutrients and phenolics. Comprehensive studies aimed at unambiguously identifying the phenolic components in goji berries are still lacking. In this paper, we report on the isolation and NMR-based identification of the major phenolics in commercially available goji berries. Together with already known phenolics, including caffeic acid, p-coumaric acid, rutin, scopoletin, N-trans-feruloyl tyramine, and N-cis-feruloyl tyramine, an unreported N-feruloyl tyramine dimer was characterized as the most abundant polyphenol isolated from the berries. Usually divalent molecules show enhanced biological activities than their corresponding monomers. (C) 2015 Elsevier Ltd. All rights reserved.