[{"from": "human", "value": "Could you give me a brief overview of this molecule? [Na+1].[123I-1]"}, {"from": "gpt", "value": "The molecule is a radiopharmaceutical containing the radioisotope I-123 with diagnostic property. After absorption, the iodide is distributed through the extracellular fluid of the body and accumulates in the thyroid gland, thereby allowing measurement of thyroid function."}]