[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C][Ring1][#Branch1][=O]"}, {"from": "gpt", "value": "The molecule is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. It has a role as an allergen. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans."}]