[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a pentenedioate that is the dianion obtained by the deprotonation of both the carboxy groups of glutaconic acid. It has a role as a human metabolite. It is a conjugate base of a glutaconate(1-)."}, {"from": "gpt", "value": "[C][Branch1][Branch2][/C][=C][/C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]