[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an organic sodium salt comprising equal numbers of sodium and propionate ions. It has a role as an antifungal drug and a food preservative. It contains a propionate."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][O-1].[Na+1]"}]