[{"from": "human", "value": "Provide a brief overview of this molecule. [O-1][P][=Branch1][C][=O][Branch1][C][O-1][O-1].[O-1][P][=Branch1][C][=O][Branch1][C][O-1][O-1].[Ca+2].[Ca+2].[Ca+2]"}, {"from": "gpt", "value": "The molecule is a calcium phosphate."}]