CUDC-101是一种强效的HDAC、EGFR和HER2抑制剂，IC50值分别为4.4、2.4和15.7 nM。它是一种包含炔基的砌块化学探针，用于铜催化的偶联反应（CuAAc）。

Quisinostat 2HCl is a second-generation HDAC inhibitor with highest potency for HDAC1 with IC50 of 0.11 nM in a cell-free assay, modest potent to HDACs 2, 4, 10, and 11, greater than 30-fold selectivity against HDACs 3, 5, 8, and 9 and lowest potency to HDACs 6 and 7.

Pracinostat is a potent pan-HDAC inhibitor with IC50 of 40-140 nM with exception for HDAC6 and has no activity against the class III isoenzyme SIRT I.

TMP195 is an inhibitor of class IIa histone deacetylase (HDAC) with IC50 of 15 nM - 59 nM for HDAC4, 5, 7 and 9.

Domatinostat is a selective class I HDAC inhibitor with IC50 of 1.20 μM, 1.12 μM, and 0.57 μM for HDAC1, HDAC2, and HDAC3, respectively. Also displays inhibitory activity against Lysine specific demethylase 1 (LSD1).

LMK-235是一种强效且选择性的HDAC4/5抑制剂，对HDAC5、HDAC4、HDAC6、HDAC1、HDAC2、HDAC11和HDAC8的IC50值分别为4.22 nM、11.9 nM、55.7 nM、320 nM、881 nM、852 nM和1278 nM，用于癌症研究。

TMP269 is an inhibitor of class IIa HDAC with IC50 of 157 nM, 97 nM, 43 nM and 23 nM for HDAC4, HDAC5, HDAC7 and HDAC9, respectively.