Chemical structures of two compounds found in red wine and berries that provide beneficial effects are shown. Resveratrol is on the left and pterostilbene is on the right.
N. R. Gough, Anti-Aging Supplements III: Berries and Wine for Healthy Aging. BioSerendipity (20 June 2018) https://www.bioserendipity.com/anti-aging-iii/.