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