[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a potassium salt comprising equal numbers of potassium and acetate ions It has a role as a food acidity regulator. It contains an acetate."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O-1].[K+1]"}]