CUK
  -OEChem-05172420553D

  6  6  0     0  0  0  0  0  0999 V2000
   -0.3130   -0.0860    0.5460 S   0  0  0  0  0  0  0  0  0  0  0  0
    0.4390    1.4830   -0.2300 Cu  0  0  0  0  0  0  0  0  0  0  0  0
    1.9090    0.4280   -0.8230 S   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0590    0.5860    0.2140 Cu  0  0  0  0  0  0  0  0  0  0  0  0
   -0.6870   -1.5980   -0.5420 Cu  0  0  0  0  0  0  0  0  0  0  0  0
    1.5020   -0.6440    0.6980 Cu  0  0  0  0  0  0  0  0  0  0  0  0
  1  4  1  0  0  0  0
  1  2  1  0  0  0  0
  1  5  1  0  0  0  0
  1  6  1  0  0  0  0
  2  3  1  0  0  0  0
  3  6  1  0  0  0  0
M  END
> <OPENEYE_ISO_SMILES>
S1[Cu]S([Cu]1)([Cu])[Cu]

> <OPENEYE_INCHI>
InChI=1S/4Cu.2S

> <OPENEYE_INCHIKEY>
PDBAWKBNXYUXTL-UHFFFAOYSA-N

> <FORMULA>
Cu4S2

$$$$