Page 4 - CS06_Hudz

Features of chemical structure of flavonoids

 Flavonoids and phenolic acids are characterised

by high antioxidative potential which is closely

related to their chemical structure.

 The high antioxidant potential of phenolic acids is

due to the presence and location of hydroxyl

groups, a carboxyl group in the immediate

vicinity of ortho-diphenolic substituents, and the

ethylene group between the phenyl ring and the

carboxyl group.

 As regards flavonoids, essential structural

elements are hydroxyl groups at the C5 and C7

positions in the A ring, and at the C3′ and C4′

positions in the B ring, and a hydroxyl group at

the C3 position in the C ring.

lavender (Lavandula

officinalis)