[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. Powdery white solid with a slight fatty odor. Sinks in water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1].[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1].[Pb+2]"}]