[{"from": "human", "value": "Provide a brief overview of this molecule. [C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[Na+1].[Na+1].[Na+1].[Na+1].[Fe+2]"}, {"from": "gpt", "value": "The molecule is a coordination compound of sodium, iron, and cyanide. It is added to road and food grade salt as an anticaking agent, and is also used in photography and in the pigment Prussian blue. (L562)"}]