Mercaptopurine

This classification denotes a purine antagonist and immunosuppressant with the molecular formula C5H4N4S.H2O, a preparation that US FDA regulates as an active ingredient or moiety under Unique Ingredient Identifier (SRS UNII) E7WED276I5, chemically known as 1,7-dihydro-6h-purine-6-thione but more generally known as 6-mercaptopurine monohydrate, which bears US NIH Compound Identifier 667490. European Medicines Agency schedules Mercaptopurine in its eXtended EudraVigilance Medicinal Product Dictionary or XEVMPD under Index SUB12149MIG. World Health Organization schedules 6-mercaptopurine monohydrate in its Anatomical Therapeutic Chemical (ATC) Classification. Most nations, for tariff and trade purposes, schedule mercaptopurine under HS 29335995 and SITC 51576. As of Q4 2014, MERCAPTOPURINE remains US FDA's Preferred Term for this commodity. Mercaptopurine bears US NLM identifiers UMLS ID C0000618 and NCI Concept Code C195. SMILES: C1=NC2=C(N1)C(=S)N=CN2.