The VIV atom in the title complex. [V(C19H17N3O2S)O]. is coordinated by two N and two O atoms of the dianionic tetradentate Schiff base ligand and the terminal oxide O atom. The N2O3 donor set defines a square-pyramidal coordination geometry with the oxide O atom in the apical site. https://megavitamines.shop/product-category/quercetin-phytosome/