ACHP (compound 4j) is a selective and orally active IκB kinase inhibitor with IC₅₀ values of 8.5 nM and 250 nM for IKKβ and IKKα, respectively. ACHP can effectively inhibit the STAT3 signaling pathway and induce cancer cell cycle arrest and apoptosis. ACHP shows anti-inflammatory activity in a mouse ear edema model. ACHP can be used in anti-inflammatory and anti-cancer (such as multiple myeloma and leukemia) studies^[1][2][3][4].