Droxinostat is a selective inhibitor of HDAC, mostly for HDACs 6 and 8 with IC50 of 2.47 uM and 1.46 uM, greater than 8-fold selective against HDAC3 and no inhibition to HDAC1, 2, 4, 5, 7, 9, and 10. Target:HDAC Pathway:Cytoskeletal Signaling MW:243.69