[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=Branch1][O][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O][C][C][O]"}, {"from": "gpt", "value": "The molecule is an ionic polymer resulting from the deprotonation of the terminal carboxy groups of poly(ethylene terephthalate) polymer. It is an ionic polymer and a homopolymer macromolecule. It is a conjugate base of a poly(ethylene terephthalate) polymer."}]