The extract was purified by an extraction in solid phase. The extract (approx. 1 g) was resuspended with 10 mL of acidified water with HCl at 0.15%. The C-18 Sep-Pack cartridge (Agilent Technologies) was activated passing through 10 mL of acidified methanol (0.15% of HCl), followed by 10 mL of acidified water (0.15% of HCl). The resuspended extract (10 mL) was also passed through and the phenolic compounds were absorbed onto cartridge. Sugars, organic acids and other water-soluble compounds were washed with 20 mL of acidified water (0.15% of HCl). The phenolic compounds were recovered with 20 mL acidified methanol (0.15% of HCl). The methanolic extract was vacuum concentrated at 35 °C to dryness leaving a red residue.