At the beginning of the storage, the wine samples did not show any statistical differences on phenolic acids and flavonols content (p b 0.05). However, after 5 months of storage, the wines showed different evolution of phenolic
acids and flavonols content. As seen previously for the anthocyanins,the total content of phenolic acids and flavonols in all wine samples decreased during the 5 months of bottle storage (up to 11% and 19% less content for the case of phenolic acids and flavonols, respectively), although to a lower extent than the anthocyanins. This decrease could be due to the chemical oxidation and/or co pigment formation of these compounds with anthocyanins