title: Purines, pyrimidines, and imidazoles. 37. Some new syntheses of pyrazolo[3,4-d]pyrimidines, including allopurinol.
mesh_terms: D000493:Allopurinol / Q000138:chemical synthesis; D000963:Antimetabolites / Q000138:chemical synthesis*; D011720:Pyrazoles / Q000138:chemical synthesis*; D011743:Pyrimidines; D013057:Spectrum Analysis
chemical_list: D000963:Antimetabolites; D011720:Pyrazoles; D011743:Pyrimidines; D000493:Allopurinol