[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an organic sodium salt resulting from the replacement of the protons from the carboxy groups of fumaric acid by sodium ions. It has a role as a food acidity regulator. It contains a fumarate(2-)."}, {"from": "gpt", "value": "[C][=Branch1][#Branch1][=C][/C][=Branch1][C][=O][O-1][\\C][=Branch1][C][=O][O-1].[Na+1].[Na+1]"}]