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Features of chemical structure of flavonoids

 Furthermore, both, the double bond between C2

and C3, and a ketone group at the C4 position in

the C ring enhance the antioxidative potential of

these compounds.

 Polyphenols have an ideal chemical structure for

scavenging free radicals and for creating chelates

with metal ions, which makes them effective

antioxidants in vivo.

 Seven groups of flavonoids are distinguished Lemon
foxglove
because of their chemical structure:

 flavons, flavonols,

 flavanes, flavanons,

 anthocyans,

 isoflavons, and chalcones. Echinacea