[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a monovalent inorganic anion obtained by deprotonation of one of the two OH groups in phosphonic acid. It is a phosphorus oxoanion and a monovalent inorganic anion. It is a conjugate base of a phosphonic acid. It is a conjugate acid of a phosphonate(2-)."}, {"from": "gpt", "value": "[O][P][=Branch1][C][=O][=O]"}]