MSK
  -OEChem-10112419273D

  8 10  0     0  0  0  0  0  0999 V2000
   -1.7670   -0.0000    0.9180 S   0  3  0  0  0  0  0  0  0  0  0  0
    1.8320   -2.1800   -0.2250 S   0  0  0  0  0  0  0  0  0  0  0  0
    0.9660    0.0000    1.2080 S   0  3  0  0  0  0  0  0  0  0  0  0
    1.8320    2.1800   -0.2250 S   0  0  0  0  0  0  0  0  0  0  0  0
   -3.2930   -0.0000   -0.6530 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   -0.2590    1.4690    0.1540 Fe  0  0  0  0  0  0  0  0  0  0  0  0
    2.1670    0.0000   -0.6160 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   -0.2580   -1.4690    0.1540 Fe  0  0  0  0  0  0  0  0  0  0  0  0
  1  5  1  0  0  0  0
  1  8  1  0  0  0  0
  1  6  1  0  0  0  0
  2  8  1  0  0  0  0
  2  7  1  0  0  0  0
  4  6  1  0  0  0  0
  4  7  1  0  0  0  0
  3  8  1  0  0  0  0
  3  6  1  0  0  0  0
  3  7  1  0  0  0  0
M  CHG  2   1   1   3   1
M  END
> <OPENEYE_ISO_SMILES>
S1[Fe]2S[Fe]3[S+]2[Fe]1[S+]3[Fe]

> <OPENEYE_INCHI>
InChI=1S/4Fe.4S/q;;;;;;2*+1

> <OPENEYE_INCHIKEY>
BEJQIPSIAWWLMO-UHFFFAOYSA-N

> <FORMULA>
Fe4S4+2

$$$$