[{"from": "human", "value": "Please give me some details about this molecule. [C][Branch1][=C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained by deprotonation of both carboxy groups of octadecanedioic acid. It is a conjugate base of an octadecanedioic acid."}]