[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule has been used to treat manic episodes since the 19th century. Though it is widely used, its mechanism of action is still unknown. Lithium carbonate has a narrow therapeutic range and so careful monitoring is required to avoid adverse effects."}, {"from": "gpt", "value": "[Li+1].[Li+1].[C][=Branch1][C][=O][Branch1][C][O-1][O-1]"}]