FES
  -OEChem-04262420153D

  4  4  0     0  0  0  0  0  0999 V2000
   16.2370    5.4090   27.3980 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   16.3610    2.6660   27.4880 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   17.4220    4.0790   28.8290 S   0  0  0  0  0  0  0  0  0  0  0  0
   15.3800    3.9190   25.9720 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

$$$$