[{"from": "human", "value": "Could you 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-1]"}, {"from": "gpt", "value": "The molecule is a purinecarboxylate. It is functionally related to a xanthine. It is a conjugate base of a xanthine-8-carboxylic acid."}]