d="p0005">An oak wood oenological commercial tannin was extracted and fractionated on XAD-16.
dd><dt class="label">•dt><dd>d="p0010">Fractions X1B and X2B showed enhanced antioxidant activity.
dd><dt class="label">•dt><dd>d="p0015">Fractions X1C and X2C showed noticeable α-glucosidase inhibitory activity.
dd><dt class="label">•dt><dd>d="p0020">The HPLC/ESI-MS/MS and 1H NMR analyses allowed to identify the main constituents.
dd>dl>