[{"from": "human", "value": "What can you tell me about this molecule? [C][O][C][=Branch1][C][=O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a diester resulting from the formal condensation of the carboxy groups of terephthalic acid with methanol. It is a primary ingredient widely used in the manufacture of polyesters and industrial plastics. It is a methyl ester, a diester and a phthalate ester. It is functionally related to a terephthalic acid."}]