Resveratrol, referred to as Res, also known as Polygonum cuspidatum, Stilbene triphenol, etc., the chemical name is 3,4',5,-trihydroxystilbene (3,5,4'-trihydroxystilbene), which belongs to polyphenols Phytoalexin-like compounds. In nature, resveratrol widely exists in the roots, stems, flowers, leaves, epidermis and fruits of plants in cis and trans structures, and is a non-flavonoid polyphenol compound containing stilbene structures. High-purity resveratrol is a colorless needle-shaped crystalline solid, and commercially available products are generally off-white or white powder.