[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][C][=Branch1][C][=O][O][C][Ring1][=Branch1][=O]"}, {"from": "gpt", "value": "The molecule is a tetrahydrofurandione that is succinic anhydride substituted by a methyl group at position 3. It has a role as a metabolite. It is a cyclic dicarboxylic anhydride and a tetrahydrofurandione. It is functionally related to a succinic anhydride."}]