[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a carbamoyl derivative of butyric acid which includes a 1,3-diketone functionality. It has a role as a hapten. It is functionally related to a butyric acid."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][C][=Branch1][C][=O][C][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][C][=Branch1][C][=O][C][C][C][C][=Branch1][C][=O][O]"}]