[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the acyl chloride obtained by displacement of the hydroxy group of dichloroacetic acid by chloride. It has a role as a hapten. It is functionally related to a dichloroacetic acid."}, {"from": "gpt", "value": "[C][Branch1][=Branch1][C][=Branch1][C][=O][Cl][Branch1][C][Cl][Cl]"}]