F3S
  -OEChem-04262419523D

  7  9  0     0  0  0  0  0  0999 V2000
   -0.4680   -1.7070    0.0400 Fe  0  0  0  0  0  0  0  0  0  0  0  0
    1.7120    0.4480    0.0400 Fe  0  0  0  0  0  0  0  0  0  0  0  0
   -1.2440    1.2590    0.0400 Fe  0  0  0  0  0  0  0  0  0  0  0  0
    1.7180   -1.7380    0.3500 S   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3640   -0.6180    0.3500 S   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    0.0000   -1.2560 S   0  4  0  0  0  0  0  0  0  0  0  0
    0.6470    2.3570    0.3500 S   0  0  0  0  0  0  0  0  0  0  0  0
  1  4  1  0  0  0  0
  1  5  1  0  0  0  0
  1  6  1  0  0  0  0
  2  4  1  0  0  0  0
  2  6  1  0  0  0  0
  2  7  1  0  0  0  0
  3  5  1  0  0  0  0
  3  6  1  0  0  0  0
  3  7  1  0  0  0  0
M  RAD  1   6   2
M  END
> <OPENEYE_ISO_SMILES>
S1[Fe]2S[Fe]3[S]2[Fe]1S3

> <OPENEYE_INCHI>
InChI=1S/3Fe.4S

> <OPENEYE_INCHIKEY>
FCXHZBQOKRZXKS-UHFFFAOYSA-N

> <FORMULA>
Fe3S4

$$$$