Chemical structures of pyridine derivatives 279–287 and their IC₅₀ values against cholinesterase enzymes.

Compound no.	Chemical structure	IC50 values (µM)		References
		AChE	BChE
279		0.95	—	278
280		0.23	—	278
281		0.153 nM	38.6 nM	279
282		52.8 nM	0.828 nM	279
283		—	153 nM	279
284		—	828 nM	279
285		—	0.088	280
286		6.32	—	281
287		5.58	—	281