MALT1 inhibitor (IC50 = 5.84 μM). Binds directly to MALT1 and irreversibly suppresses protease function. Decreases NF-κB activity induced by MALT1. Inhibits cell proliferation and MALT1-mediated cleavage activity. Suppresses human TMD8 and HBL-1 activated B cell-like diffuse large B cell lymphoma (ABC-DLBCL) tumor xenografts in mice and primary human ABC-DLBCLs ex vivo. Purity 98%. MW (observed): 455.72