UNC669 is primarily utilized in biochemical research to study protein-protein interactions, particularly those involving the chromodomain of proteins. It serves as a selective inhibitor of the chromodomain of L3MBTL1, a protein that plays a role in chromatin organization and gene regulation. By inhibiting L3MBTL1, UNC669 helps researchers explore the mechanisms of epigenetic regulation and the impact of chromatin modifications on gene expression. This chemical is valuable in understanding diseases linked to epigenetic dysregulation, such as cancer, and in developing potential therapeutic strategies targeting chromatin-associated proteins.