[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a colorless to pale yellow crystalline solid. Sinks in and mixes with water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][=C][C][=Branch1][=Branch2][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][N+1][=Branch1][C][=O][O-1]"}]