Table 1.

Evaluation of effect of different zinc-binding groups on HDAC inhibitory activity by growth inhibition assay using HCT116 cells at a maximum concentration of 100 μM.

Compound	HCT116 IC50	Compound	HCT116 IC50
	>100		>100
	>100		>100
	>100		>100
	>100		>100
	>100		>100
	>100		>100
	>100		>100
	>100		54.39 ± 6.02
	>100