[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a calcium phosphate. It has a role as a fertilizer."}, {"from": "gpt", "value": "[O][P][=Branch1][C][=O][Branch1][C][O][O-1].[O][P][=Branch1][C][=O][Branch1][C][O][O-1].[Ca+2]"}]