Table 4
α-Amylase inhibitory activity of catechu, gallnut, clove, and mixtures (%)

Sample		Sample concentration (μg/mL)
Sample		31.25		62.5
Catechu		23.13±0.24^CD1)		22.31±2.73^B
Gallnut		25.49±2.45^D		21.99±2.11^B
Clove		22.44±0.59^BC		19.67±0.08^AB*2)
Catechu+gallnut		20.04±2.32^AB		18.49±0.85^A
Catechu+clove		19.22±0.70^A		18.31±1.85^A
Gallnut+clove		19.72±1.09^AB		16.77±1.77^A
Catechu+gallnut+clove		17.63±1.76^A		16.99±0.95^A
Acarbose³⁾	concentration	15.625	31.25	62.5	125
Acarbose³⁾	activity	43.14±2.185	55.29±0.70	61.80±1.84	69.83±1.21

¹⁾Each value represents mean±SD (n=3). Means with different superscript in the same column are significantly different at p<0.05.
²⁾Means with superscript (*) in the same sample are significantly different at p<0.01.
³⁾Positive control.