KH-259 (compound 1) is a highly potent, selective, and CNS-penetrant HDAC6 inhibitor, demonstrating an IC50 of 0.26 μM. It exerts its antidepressant effects in mice by inhibiting HDAC6 within the brain. Therefore, KH-259 holds promise as a valuable tool for neurodegenerative diseases research [1].
BET-IN-24 (example 2) is a bromodomain and extra-terminal (BET) inhibitor used in studies of virology, heart failure, inflammation, central nervous system (CNS) diseases, and various cancers.