A secondary-metabolic compound, 3-O-feruloylquinic acid, was isolated from winter wheat (Triticum aestivum L. cv Chihokukomugi) and identified by NMR, MS and UV spectral analyses. HPLC analysis showed that the accumulation of the compound in winter wheat was triggered by exposure to low temperature. In addition, ESR spectral analysis showed that the compound exhibited antioxidative activity.
