[{"from": "human", "value": "Provide a description of this molecule. [C][=C][Branch1][O][N][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O][N][=C][Branch1][Ring2][N][Ring1][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a purinemonocarboxylic acid. It is functionally related to a xanthine. It is a conjugate acid of a xanthine-8-carboxylate."}]