Abstract: The present invention relates to the use of a compound of formula (I), a pharmaceutically acceptable salt thereof, a solvate thereof, or a pharmaceutical composition containing the same in reducing uric acid level, preventing or reducing inflammations, and preventing or treating uratic or gouty diseases. In particular, the present invention relates to the use of a compound of formula (I), a pharmaceutically acceptable salt thereof, a solvate thereof, or a pharmaceutical composition containing the same in the manufacture of a medicament for the treatment or prevention of hyperuricemia, gout, gouty inflammations, pain and uric acid nephropathy. R1 represents hydrogen, C1-4 alkyl or the like. R2 represents C1-10 alkyl or the like. R3 represents halogen or the like.