[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=C][Branch1][#Branch2][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O][C][Ring1][O][=O]"}, {"from": "gpt", "value": "The molecule is a 2-benzofuran compound having oxo groups at the 1- and 3-positions and a carboxy substituent at the 5-position; the cyclic anhydride formed from the carboxy groups at the 1- and 2-positions of trimellitic acid. It has a role as an epitope, an allergen and a hapten. It is a cyclic dicarboxylic anhydride, a dioxo monocarboxylic acid and a member of 2-benzofurans. It is functionally related to a phthalic anhydride and a trimellitic acid."}]