[{"from": "human", "value": "Describe this molecule. [C][C][C][C][=Branch1][C][=O][N][C][=C][Branch2][Ring1][=Branch2][C][=C][Branch2][Ring1][Ring1][C][=Branch1][Branch1][=C][Ring1][=Branch1][I][C][C][Branch1][Ring1][C][C][C][=Branch1][C][=O][O][I][I]"}, {"from": "gpt", "value": "The molecule is a radiocontrast agent used in cholecystography, the X-ray diagnosis of gallstones under the trade names include Bilopaque, Lumopaque, Tyropaque, and Bilopac. The molecule contains three heavy iodine atoms which obstruct X-rays in the same way as the calcium in bones, which results in a visible image."}]