[{"from": "human", "value": "Could you provide a description of this molecule? [O][P+1][=Branch1][C][=O][O][P+1][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monovalent inorganic anion obtained by deprotonation of one of the two OH groups in diphosphoniic acid. It is a phosphorus oxoanion and a monovalent inorganic anion. It is a conjugate base of a diphosphonic acid. It is a conjugate acid of a diphosphonate(2-)."}]