[{"from": "human", "value": "Describe this molecule. [C][=Branch1][C][=O][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained by deprotonation of both carboxy groups of oxalic acid. It has a role as a human metabolite and a plant metabolite. It is an oxalate and a dicarboxylic acid dianion. It is a conjugate base of an oxalate(1-)."}]