Grape skin extract, also known as grape skin red ENO。 Grape skin pigment is a natural food pigment extracted from grape skin, with a color ranging from red to dark purple. It belongs to the natural anthocyanin pigment class, which is safe, non-toxic, and contains certain nutritional components.

The chemical composition of red grape skins contains 25% to 50% polyphenols, mainly anthocyanins, resveratrol, and flavonoids. Grape skin red is an anthocyanin pigment. The main coloring components are the glucosides of Malvidin, Paeonidin, Delphinidin, and 3 '- Petunidin or Cyanidin. This information is compiled by Shiyan, the editor of Chemicalbook. (September 9, 2015) Figure 2 shows the structural formula of Malvacrol (C17H15O7X): R, R '=OCH3 Cuiquexin (C15H11O7X): R, R'=OH Paeoniflorin (C16H13O6X): R=OCH3, R '=H3' - Jiahuacui (C16H13O7X): R=OCH3, R '=OHX -=acid component