[{"from": "human", "value": "Generate a molecule based on this description. The molecule is an organic molecular entity."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][C][C][=Branch1][C][=O][O-1].[C][C][=Branch1][C][=O][C][C][C][=Branch1][C][=O][O-1].[Ca+2]"}]