ER2
  -OEChem-07262417323D

  8 11  0     1  0  0  0  0  0999 V2000
   24.6850  -18.4900  -30.9700 S   0  4  2  0  0  0  0  0  0  0  0  0
   24.8160  -20.1840  -32.4850 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   26.8230  -17.8320  -30.4060 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   28.0020  -18.2350  -32.2960 S   0  0  0  0  0  0  0  0  0  0  0  0
   27.5460  -19.4250  -28.8810 S   0  4  0  0  0  0  0  0  0  0  0  0
   28.1320  -20.0850  -30.9990 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   25.7150  -20.2860  -29.9710 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   26.5340  -21.4990  -31.7460 S   0  4  1  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  1  3  1  0  0  0  0
  1  7  1  0  0  0  0
  2  8  1  0  0  0  0
  3  4  1  0  0  0  0
  3  5  1  0  0  0  0
  4  6  1  0  0  0  0
  5  6  1  0  0  0  0
  5  7  1  0  0  0  0
  6  8  1  0  0  0  0
  7  8  1  0  0  0  0
M  RAD  3   1   2   5   2   8   2
M  END
> <OPENEYE_ISO_SMILES>
S1[Fe]2[S@]3[Fe][S@]4[Fe]1[S]2[Fe]34

> <OPENEYE_INCHI>
InChI=1S/4Fe.4S

> <OPENEYE_INCHIKEY>
LJBDFODJNLIPKO-UHFFFAOYSA-N

> <FORMULA>
Fe4S4

$$$$