DNMT-IN-6 is a DNA methyltransferase inhibitor with activity against DNMT1, DNMT3A, and DNMT3B. DNMT-IN-6 drives demethylation, and restores TMS1 tumor suppressor gene expression. DNMT-IN-6 induces apoptosis, causes G2/M phase arrest, disrupts mitochondrial integrity, and activates the intrinsic caspase cascade (3/7/9). DNMT-IN-6 inhibits tumor growth, and improves survival in xenograft models. DNMT-IN-6 can be used for the research of cancer, such as diffuse large B-cell lymphoma[1].