topiroxostat topiroxostat topiroxostat (inn; trade names topiloric, uriadec) is a drug for the treatment of gout and hyperuricemia. it was approved for use in japan in june 2013. topiroxostatclinical datatrade namestopiloric, uriadecatc codenonelegal statuslegal status approved in japan identifiers iupac name 4--2-pyridinecarbonitrile cas number577778-58-6pubchem cid5288320chemspider4450517unii0j877412jvcomptox dashboard (epa)dtxsid80206462 chemical and physical dataformulac13h8n6molar mass248.249 g·mol−13d model (jsmol)interactive image smiles c1=cn=cc=c1c2=nc(=nn2)c3=cc(=nc=c3)c#n inchi inchi=1s/c13h8n6/c14-8-11-7-10(3-6-16-11)13-17-12(18-19-13)9-1-4-15-5-2-9/h1-7h,(h,17,18,19)key:ubvzqgovtlihlh-uhfffaoysa-n topiroxostat is a xanthine oxidase inhibitor which reduces serum urate levels.