[{"from": "human", "value": "What can you tell me about this molecule? [C][O][C][Branch1][Branch2][C][N][C][=Branch1][C][=O][N][C][197Hg][Cl]"}, {"from": "gpt", "value": "The molecule is a radiolabelled form of chlormerodrin, an organomercury compound that was previously used as a diuretic. Its radiolabelled form was used as diagnostics in brain scans."}]