Table 6 α-Glucosidase inhibition activity of extracts from Stachys sieboldii Miq. (%)

Extraction solvent	Concentration (μg/mL)
	250	500	1,000	2,000
	Water	-	-	-	-
Ethanol	11.15±0.671)a2)A3)	28.32±1.37aB	47.47±1.05bC	68.70±0.48cD
Butanol	15.43±1.68bA	39.53±0.64cB	46.46±1.08bC	65.96±1.48bD
Chloroform	20.65±0.95cA	35.11±0.61bB	43.75±0.59aC	51.18±1.31aD
Hexane	57.76±1.17dA	65.31±1.85dB	65.57±1.31cB	68.34±0.90cC

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).