Table 2. α-Amylase inhibition activity of compounds 5a–g.

Compound	Concentration (μg mL–1)	OD at 595 nm	Residual activity	% inhibition
5a	50	0.102	24.05	75.94
	100	0.042	9.90	90.04
	200	0.032	7.54	92.15
5b	50	0.088	20.75	79.24
	100	0.069	16.27	83.72
	200	0.068	16.04	83.97
5c	50	0.211	49.76	48.08
	100	0.078	18.39	81.60
	200	0.066	15.73	84.27
5d	50	0.208	49.05	50.94
	100	0.080	18.87	81.13
	200	0.106	24.97	75.03
5e	50	0.097	28.87	77.12
	100	0.078	18.39	81.60
	200	0.093	21.95	78.05
5f	50	0.203	47.87	52.12
	100	0.115	27.12	72.87
	200	0.011	2.59	97.40
5g	50	0.148	11.79	65.09
	100	0.050	34.90	88.20
	200	0.178	41.98	58.00
Acarbose	50	0.218	51.52	48.58
	100	0.196	46.23	53.77
	200	0.154	36.32	63.68