OFE
  -OEChem-10112419273D

  2  1  0     0  0  0  0  0  0999 V2000
   -0.3420    0.0000   -0.0000 Fe  0  0  0  0  0  0  0  0  0  0  0  0
    1.1920    0.0000   -0.0000 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=[Fe]

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

> <OPENEYE_INCHIKEY>
UQSXHKLRYXJYBZ-UHFFFAOYSA-N

> <FORMULA>
FeO

$$$$