Iguratimod(T 614) is one of a series of 4H-1-benzopyran-4-ones which has potent anti-inflammatory, analgesic and antipyretic activity. Iguratimod(T 614) is a selective inhibitor of cyclo-oxygenase-2 (COX-2), and inhibits the production of interleukin-1 (IL-1), IL-6, IL-8 and tumour necrosis factor.