[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule appears as a white solid (shipped packed in Dry Ice to stabilize) with a sharp unpleasant odor. Insoluble in sater and sinks in water. Used as polymerization catalyst. (USCG, 1999)"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][O][C][=Branch1][C][=O][O][O][C][=Branch1][C][=O][O][C][Branch1][C][C][C]"}]