Table 3 ABTS radical scavenging activity of extracts from Stachys sieboldii Miq. (%)

Extraction solvent	Concentration (μg/mL)
	500	1,000	2,000
	Water	28.73±0.411)^c2)^A3)	49.20±0.70^cB	83.63±0.23^cC
Ethanol	96.52±0.08^dA	97.79±0.05^dB	97.99±0.02^dC
Butanol	97.99±0.21^eA	98.39±0.18^dAB	98.64±0.22^dB
Chloroform	23.08±0.33^bA	39.72±0.78^bB	66.24±1.50^bC
Hexane	18.91±0.19^aA	34.30±0.42^aB	63.50±0.34^aC

All values are mean SD (n=3).
^a-dMeans with different superscript small letters within the same concentration are significantly different by Duncan’s multiple range test (p<0.05).
^A-CMeans with different superscript capital letters within the same extraction solvent are significantly different by Duncan’s multiple range test (p<0.05).