C1O
  -OEChem-11012421173D

  2  1  0     0  0  0  0  0  0999 V2000
    0.0000    0.0000    0.2500 Cu  0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    0.0000   -0.9930 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0  0  0  0
M  END
> <OPENEYE_ISO_SMILES>
O=[Cu]

> <OPENEYE_INCHI>
InChI=1S/Cu.O

> <OPENEYE_INCHIKEY>
QPLDLSVMHZLSFG-UHFFFAOYSA-N

> <FORMULA>
CuO

$$$$