[{"from": "human", "value": "Please give me some details about 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][I][C][=Branch1][C][=O][N][C][I]"}, {"from": "gpt", "value": "The molecule is an ionic tri-iodinated benzoate used as a contrast agent in diagnostic imaging. Like other organic iodine compounds, iothalamic acid blocks x-ray and appears opaque on x-ray film, thereby enhancing the visibility of structure and organs during angiography, arteriography, arthrography, cholangiography, and computed tomography (CT) scanning procedures."}]