Thiopurinol or tisopurine

This classification denotes a xanthine oxidase inhibitor and uricosuric agent with the molecular formula C5H4N4S, a preparation that US FDA regulates as an active ingredient or moiety under Unique Ingredient Identifier 79F9I2R16M, chemically known as 5h-pyrazolo(3,4-d)pyrimidine-4-thione but generally known as tisopurine, which bears US NIH Compound Identifier 667510. European Medicines Agency schedules Tisopurine in its eXtended EudraVigilance Medicinal Product Dictionary or XEVMPD under Index SUB11121MIG. The term TISOPURINE is an International Non-Proprietary Name or INN (see WHO INN reference publication, Volume 30, No. 10 1976, List 16). World Health Organization schedules tisopurine in its Anatomical Therapeutic Chemical (ATC) Classification. TISOPURINE is scheduled in the U.S. International Trade Commission's Harmonized Tariff System (HTS) Pharmaceutical Appendix. Thiopurinol or tisopurine bears US NLM identifiers UMLS ID C0076516 and NCI Concept Code C80872. SMILES: C1=C2C(=NC=NC2=S)NN1.