RESIDUE   NFU      8
CONECT      FE     4 C1   C2   C3   NI  
CONECT      C1     2 FE   N1  
CONECT      N1     1 C1  
CONECT      C2     2 FE   N2  
CONECT      N2     1 C2  
CONECT      C3     2 FE   O3  
CONECT      O3     1 C3  
CONECT      NI     1 FE  
END   
HET    NFU              8
HETSYN     NFU NI-FE REDUCED ACTIVE CENTER
HETNAM     NFU formyl[bis(hydrocyanato-1kappaC)]ironnickel(Fe-Ni)
FORMUL      NFU    C3 Fe N2 Ni O