FES
  -OEChem-04192423153D

  4  4  0     0  0  0  0  0  0999 V2000
    0.0000   -0.2130   -1.5310 Fe  0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -0.2130    1.5310 Fe  0  0  0  0  0  0  0  0  0  0  0  0
    1.4610    0.3720    0.0000 S   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4610    0.3720    0.0000 S   0  0  0  0  0  0  0  0  0  0  0  0
  1  3  1  0  0  0  0
  1  4  1  0  0  0  0
  2  3  1  0  0  0  0
  2  4  1  0  0  0  0
M  END
> <OPENEYE_ISO_SMILES>
S1[Fe]S[Fe]1

> <OPENEYE_INCHI>
InChI=1S/2Fe.2S

> <OPENEYE_INCHIKEY>
NIXDOXVAJZFRNF-UHFFFAOYSA-N

> <FORMULA>
Fe2S2

$$$$