Fig. 1

Structures of chemical components of Asteraceae. Chalcone [1-1], aurone [1-2], flavone: R=H apigenin, R=OH luteolin [1-3], flavonol: R=H kaempferol, R=OH quercetin [1-4], isoflavone [1-5], isoflavone (genistein) [1-6], dihydroflavonol [1-7], R₁, R₂, R3, R₄=H: quinic acid [1-8], p-coumaroyl (pCo)[1-9], caffeoyl (C) [1-10], feruloyl (F) [1-11], 5-O-caffeoylquinic acid [1-12]