Table 5 α-Amylase inhibition activity of extracts from Stachys sieboldii Miq. (%)

Extraction solvent	Concentration (μg/mL)
	1,000	2,000
	Water	120.47±1.171)^b2)^*3)	117.64±0.68^b
Ethanol	127.00±1.47^c	137.62±1.47^e*
Butanol	121.44±0.89^b	120.66±0.68^c
Chloroform	120.37±1.35^b	127.10±1.22^d*
Hexane	113.74±0.58^a*	106.34±0.34^a

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).
^*Means with different superscript within the same extraction solvent are significantly different by independent t-test (p<0.05).