[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=Branch1][C][=O][N][C][=C][Branch2][Ring1][#Branch2][C][=Branch1][P][=C][Branch1][=N][C][=Branch1][Branch1][=C][Ring1][=Branch1][I][C][=Branch1][C][=O][O-1][I][N][C][=Branch1][C][=O][C][I].[Na+1]"}, {"from": "gpt", "value": "The molecule is an iodinated radiopaque X-ray contrast medium. Diatrizoate sodium blocks X-rays, thereby allowing body structures containing iodine to be delineated in contrast to those structures that do not contain iodine and allowing visualization of these areas. This contrast agent is used as a diagnostic aid in angiography, urography and radiography. (NCI05)"}]