[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an odorless white solid. Sinks in water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][=Branch1][C][=O][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O].[K+1]"}]