{4-[5-(3-chloro-phenoxy)-oxazolo[5,4-d]pyrimidin-2-yl]-2,6-dimethyl-phenoxy}-acetic acid or a pharmaceutically acceptable salt thereof for use in the prevention or treatment of AKI (acute kidney injury).Medicament and pharmaceutical composition thereof.本發明係關於用於預防或治療AKI(急性腎損傷)的{4-[5-(3-氯-苯氧基)-噁唑并[5,4-d]嘧啶-2-基]-2,6-二甲基-苯氧基}-乙酸或其醫藥學上可接受之鹽。本發明係關於藥物及其醫藥組合物。