Xanthine oxidase-IN-5 (compound 9m) shows potent hypouricemic effects at an oral dose of 20 mg/kg in a rat hyperuricemia model induced by potassium oxonate [1]. Animal Model: Potassium oxonate-induced hyperuricemic rat model [1] Dosage: 20 mg/kg Administration: PO; single (measured serum uric acid after 0.5 - 8 hours) Result: Showed potent hypouricemic effects at an oral dose of 20 mg/kg in a rat hyperuricemia model induced by potassium oxonate.