[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a dicarboxylic acid dianion obtained by deprotonation of the two carboxy goups of bromosuccinic acid. It is functionally related to a succinate(2-). It is a conjugate base of a bromosuccinic acid."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][Br][C][=Branch1][C][=O][O-1]"}]