[{"from": "human", "value": "Could you provide a description of this molecule? [C][O][C][Branch1][Branch2][C][N][C][=Branch1][C][=O][N][C][203Hg][Cl]"}, {"from": "gpt", "value": "The molecule is chlormerodrin containing the radioactive isotope (203)Hg. It was formerly used as a diagnostic aid in determination of renal function. It has a role as a radioactive imaging agent. It is a chlormerodrin and an isotopically modified compound."}]