[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=C][C][=Branch1][=Branch2][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][123I][C][N][=C][Branch1][C][N][N]"}, {"from": "gpt", "value": "The molecule is an iodine (I) 123 labeled aralkylguanidine norepinephrine analogue used as a diagnostic imaging tracer. Iobenguane, structurally related to norepinephrine, functioning as a false substrate of norepinephrine, and is taken up and localized in the granules of pre-synaptic adrenergic neurons. When labeled with I-123, this agent is useful for the imaging of neuroendocrine tissues and tumors."}]