Zavondemstat(QC8222, TACH 101) is a small-molecule pan-inhibitor of histone lysine demethylase 4D (KDM4D) that selectively targets KDM4A-D with no effect on other KDM families. It exhibits potent antiproliferative activity in various cancer cell lines and organoid models. It displays antineoplastic activity and acts as a potential anticancer agent.