ER3
  -OEChem-11012421303D

  1  0  0     0  0  0  0  0  0999 V2000
   -8.5940    3.7690   16.8960 Er  0  1  0  0  0  0  0  0  0  0  0  0
M  CHG  1   1   3
M  END
> <OPENEYE_ISO_SMILES>
[Er+3]

> <OPENEYE_INCHI>
InChI=1S/Er/q+3

> <OPENEYE_INCHIKEY>
JHFPQYFEJICGKC-UHFFFAOYSA-N

> <FORMULA>
Er+3

$$$$