Table 2.

Isoform selectivity profile of hybrid 19 against class-I,-II and -IV HDACs.

HDAC Class HDAC Isoform	I				IIa	IIb		IV
	1	2	3	8	4,5,7,9	6	10	11
IC50 (nM) or % inhibition	222	49	2170	740	<20% at 10 µM	2.1	80	930