α-Glucosidase and α-amylase inhibitory effects of 1–13.

Compounds	Inhibition (IC50, μM)
	α-Glucosidase	α-Amylase
1	31.3 ± 2.2	52.1 ± 2.3
2	37.7 ± 1.7	45.3 ± 1.9
3	33.1 ± 1.5	56.4 ± 2.0
4	33.8 ± 1.6	36.5 ± 1.8
5	105.1 ± 2.8	>200
6	99.6 ± 3.4	135.2 ± 3.3
7	148.1 ± 2.5	>200
8	40.5 ± 1.9	44.5 ± 2.3
9	42.4 ± 2.5	39.8 ± 2.5
10	107.7 ± 2.9	>200
11	136.5 ± 3.7	148.6 ± 4.2
12	>200	127.4 ± 3.1
13	>200	166.5 ± 3.7
Acarbose a	47.1 ± 1.4	145.7 ± 2.2

^aAcarbose was used as a positive control.