title: Historical background of 6-mercaptopurine.
mesh_terms: D049673:History, 20th Century; D006801:Humans; D007166:Immunosuppressive Agents; D007938:Leukemia / Q000188:drug therapy; D015122:Mercaptopurine / Q000266:history / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D007166:Immunosuppressive Agents; D015122:Mercaptopurine