With respect to hydroxycinnamic acids, the highest content in total compounds was recorded in red varieties that showed concentrations ranging from 0.27 to 0.89 mg g−1 dw (Fig. 2C). Regarding individual compounds, caftaric acid was present at the highest concentration, ranging from 0.190 to 0.706 and from 0.082 to 0.167 mg g−1, in red and white varieties, respectively (Fig. 2C).