Table 1.

IC₅₀ values for daidzin and its structural analogs on the rate of 5-HIAA and DOPAC formation catalyzed by intact hamster and rat liver mitochondria

Compounds	IC50, μM
	Hamster		Rat
	5-HIAA	DOPAC	5-HIAA	DOPAC
Deczein	0.06	0.09	0.05	0.06
Hepzein	0.13	0.3	0.15	0.2
Hexzein	0.21	0.7	0.5	0.4
Daidzin	2.7	2.5	2.0	2.1
Daidzein	11	10	9	10
Puerarin	n.i.	n.i.	30	28
Dicarboxymethyl-daidzein	n.i.	n.i.	n.i.	n.i.

For methods, see legends of Figs. 3 and 5. n.i., no inhibition up to 30 μM.