Table 3.

The docking results of the five compounds to α-glycosidase.

Compounds	Affinity kcal/mol	Number of H-bonds	Bonding residues	Bond length
2-Caffeoyl-L-tartaric acid	− 7.7	3	ASP 1526 ASP 1420 ASP 1157	2.27 2.19 2.71
N-(E)-caffeoyldopamine	− 8.3	–	–	–
Rosmarinc acid	− 8.6	6	ARG 1510 ASP 1526 PHE 1560 TRP 1355 TRP 1369	2.77 1.86 2.25 2.48, 2.49 2.04
Methyl rosmarinate	− 8.4	2	TRP 1355 PHE 1560	2.41
				2.14
6,7,8,3′,4′-Pentamethoxyflavone	− 7.6	–	–	–

“–” means no.