Antioxidant phenolic metabolite general structures

Flavones and flavonols are relevant phytochemicals in food products, spices and medicinal plants. They are secondary metabolites belonging to the polyphenols group, and have in common the general structure of two aromatic rings and often more than three phenolic hydroxyls. Flavones and flavonols often show high antioxidant activity in vitro, and they complex metal ions and scavenge free radicals. They have a planar structure that allows intermolecular interactions and stacking in... 

Consumption of diets rich in fruits is associated with a lowered risk of cancer and cancer mortahty [1], Antioxidants in fruits contribute to their protective effect as anticarcinogens. These protective effects are attributed chiefly by ubiquitous groups of plant secondary metabolites such as phenolic compounds in addition to antioxidant vitamins C and E. Polyphenols or phenolic compounds are a widespread group of ph3dochemicals that are shown to possess different physiological activities associated with their chemical structures. In plants, phenolic compounds are generally involved in protection or defense... 

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