[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a diagnostic radiopharmaceutical agent commonly used for the preparation of Tc99m Exametazime injection. It acts as a chelating agent for the radioisotope technetium-99m to form a cationic complex. It is used in the detection of altered regional cerebral perfusion and for the radiolabeling of autologous leukocytes."}, {"from": "gpt", "value": "[C][C@@H1][Branch2][Ring1][=Branch1][N][C][C][Branch1][=N][C][N][C@@H1][Branch1][#Branch1][/C][=Branch1][Ring1][=N][/O][/C][C][Branch1][C][C][C][/C][=Branch1][Ring1][=N][/O][/C]"}]