[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an organic sodium salt and a one-carbon compound. It has a role as an antacid and a food anticaking agent. It contains a hydrogencarbonate."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][Branch1][C][O][O-1].[Na+1]"}]