Olsalazine-d₃ is deuterated labeled Olsalazine (HY-B0174A). Olsalazine is a potent inhibitor of macrophages chemotaxis to LTB4 with an IC₅₀ value of 0.39 mM, also reduces the synthesis of 5-hydroxyeicosatetraenoic acid (5-HETE), 11-HETE, 12-HETE, and 15-HETE in polymorphonuclear leukocyte (PMNL) and mononuclear cells (MNL). Olsalazine can be used for researching ulcerative colitis. Anti-inflammatory activity^[1][2].