Patent ID: 6965039

Claim:
Flavone and isoflavone derivatives represented by the following general formulae (Ia) and (Ib): in which X represents a group of formula —COOR or —PO(OR) 2 ; R represents a hydrogen atom, an alkali metal or alkaline earth metal atom, or a linear or branched lower alkyl group having 1 to 5 carbon atoms; R 1 represents a hydroxyl group, a linear or branched lower alkoxy group having 1 to 5 carbon atoms or an acyloxy group having 1 to 5 carbon atoms; R 2 and R 3 , which are identical or different, represent a hydrogen atom, a halogen atom, a trifluoromethyl group, a trichloromethyl group, a hydroxyl group, a linear or branched alkoxy group having 1 to 5 carbon atoms or an acyloxy group having 1 to 5 carbon atoms, or R 2 and R 3 together with the carbon atoms to which they are attached combine to form an alkylenedioxy group.