Patents as TopicAza CompoundsInventionsIntellectual PropertyHistory, 18th CenturyBiotechnologyHistory, 17th CenturyHistory, 19th CenturyHistory, 20th CenturyAzathioprineResearchEvolution, MolecularPhylogenyBiological EvolutionAzacitidineMolecular StructureImmunosuppressive AgentsSulfur CompoundsSpiro CompoundsVolatile Organic Compounds6-MercaptopurineStructure-Activity RelationshipAntimetabolites, AntineoplasticSmall Molecule LibrariesDose-Response Relationship, DrugPlant ExtractsBenzamidinesDrug Evaluation, PreclinicalFurans