title: [Studies on pyrazolo[3,4-d]pyrimidine derivatives. XII. On 1-phenyl-1H-pyrazolo[3,4-d]pyrimidine-4-carboxylic acid (author's transl)].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D011720:Pyrazoles; D011743:Pyrimidines
chemical_list: D011720:Pyrazoles; D011743:Pyrimidines