KDOAM-25 citrate is a potent and highly selective histone lysine demethylases 5 (KDM5) inhibitor with IC50s of 71 nM, 19 nM, 69 nM, 69 nM for KDM5A, KDM5B, KDM5C, KDM5D, respectively. KDOAM-25 citrate increases global H3K4 methylation at transcriptional start sites and impairs proliferation in multiple myeloma MM1S cells.