[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is the trianion resulting from the removal of three protons from phosphonoformic acid. It is a conjugate base of a phosphonoformic acid and a phosphonoformate(2-)."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][Branch1][C][O-1][P][=Branch1][C][=O][Branch1][C][O-1][O-1]"}]