What is the "molecular and structural" formula of "Nitroprusside"

 Nitroprusside is  Pentacyanonitrosylferrate(2-) ion ([Fe(H₂O)₅(NO)]⁺² ) and its famous salt is Disodium pentacyanonitrosylferrate(2-) dihydrate, (Na₂[Fe(H₂O)₅(NO)] ) . It is a hypotensive agent whose structural formula is given as:

 

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