[{"from": "human", "value": "Could you provide a description of this molecule? [C][O][C][Branch1][Branch2][C][N][C][=Branch1][C][=O][N][C][Hg][Cl]"}, {"from": "gpt", "value": "The molecule is urea in which one of the hydrogens is substituted by a 3-chloromercury-2-methoxyprop-1-yl group. It was formerly used as a diuretic, but more potent and less toxic drugs are now available. Its radiolabelled ((197)Hg, (203)Hg) forms were used in diagnostic aids in renal imaging and brain scans. It has a role as a diuretic and a diagnostic agent. It is an organomercury compound and a member of ureas."}]