abstract |
The present invention relates to 4-methyl-2- [4- (2-methylpropoxy) -3- (1H-1,2,3,4-tetrazole) useful as a therapeutic or prophylactic agent for gout, hyperuricemia and the like. -1-yl) phenyl] -1,3-thiazole-5-carboxylic acid and its sodium salt, and crystals thereof, and a production method thereof are provided. |