diflunisal , a salicylic acid derivative , caused a significant fall in serum uric acid concentration from 0.29 +/- 0.02 to 0.20 +/- 0.02 mmol/l ( mean +/- sem ) during chronic administration of 750 mg daily in 18 patients with rheumatoid arthritis .
C0012228
diflunisal
C0003873
rheumatoid