TABLE 2.

Summary of chemical structures and selectivity profiles of HDAC inhibitors.

Class	HDACis	Specificity
Hydroxamates	Trichostatin A	I, II, and IV
	SAHA/Vorinostat	I, II, and IV
	Belinostat	I, II, and IV
	Panabinostat	I, II, and IV
	Givinostat	I, II, and IV
	Abexinostat	I, II, and IV
	Resminostat	I, II, and IV
	Quisinostat	I, II, and IV
	Riconilostat	HDAC 6
	Practinostat	I, II, and IV
	Tefinostat	I
	MPT0E028	HDAC 1, 2, and 6
	CHR-3996	I
	CUDC-101	I, II
	CUDC-907	I, II
Cyclic peptides	Romidepsin	I
Short chain fatty acids	Sodium butyrate	I, II
	Phenylbutyrate	I, II
	Valproic acid	I, II
	AR-42	I, II
	Pivanex	I, II
	AN-9	I, II
Benzamides	Entinostat	I, II
	Mocetinostat	I, IV
	Tacedinaline	I
	4SC-202	I
	Chidamide	HDAC 1, 2, 3, and 10
	CI944	HDAC 1 and 3
Sirtuin inhibitors	Nicotinamide	III
	Sirtinol	SIRT 1 and 2
	EX527	SIRT 1 and 2
	Cambinol	SIRT 1 and 2