[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=Branch1][=Branch2][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][I][C][N][=C][Branch1][C][N][N]"}, {"from": "gpt", "value": "The molecule is a cyclotron-produced radionuclide that decays to Te 123 by electron capture. Images are produced by a I123 MIBG scintigraphy. FDA approved on September 19, 2008."}]