Allopurinol

This classification denotes a xanthine oxidase inhibitor and uricosuric agent with the molecular formula C5H4N4O, a preparation that US FDA regulates as an active ingredient or moiety under Unique Ingredient Identifier 63CZ7GJN5I, chemically known as 1,5-dihydro-4h-pyrazolo(3,4-d)pyrimidine-4-one but generally known as allopurinol, which bears US NIH Compound Identifier 2094. Allopurinol comes in various forms, including di-methyl, ribonucleoside, riboside, riboside 5-monophosphate, and sodium. European Medicines Agency schedules Allopurinol in its eXtended EudraVigilance Medicinal Product Dictionary or XEVMPD under Index SUB05338MIG. The term ALLOPURINOL is an International Non-Proprietary Name or INN (see WHO INN reference publication, Volume 33, No. 10 1979, List 19). World Health Organization schedules allopurinol in its Anatomical Therapeutic Chemical (ATC) Classification. ALLOPURINOL is scheduled in the U.S. International Trade Commission's Harmonized Tariff System (HTS) Pharmaceutical Appendix. Most nations schedule allopurinol under HS 29335995 and SITC 51576. As of Q4 2014, ALLOPURINOL remains the US FDA Preferred Term for this commodity. Allopurinol bears US NLM identifiers UMLS ID C0002144 and NCI Concept Code C224. SMILES: C1=C2C(=NC=NC2=O)NN1.