MK-2894 sodium salt is a potent, selective, orally active and high affinity (Ki=0.56 nM) full antagonist against E prostanoid receptor 4 (EP4 receptor) (IC50=2.5 nM). MK-2894 sodium salt possesses potent anti-inflammatory activity in animal models of pain/inflammation and can be used for the research of arthritis[1][2].