Notes: An HDAC inhibitor (IC50 = 16 nM); increases acetylation of histone H3 in DU145 cells at 0.1 to 2.5 µM; decreases viability of DU145 cells (IC50 = 0.11 µM); induces cell cycle arrest at the G1 phase in A2780 cells at 0.5 µM; decreases tumor volume in a PC3 prostate cancer mouse xenograft model at 25 mg/kg per day or 50 mg/kg every other day