RB
  -OEChem-04052416323D

  1  0  0     0  0  0  0  0  0999 V2000
    0.0000    0.0000    0.0000 Rb  0  3  0  0  0  0  0  0  0  0  0  0
M  CHG  1   1   1
M  END
> <OPENEYE_ISO_SMILES>
[Rb+]

> <OPENEYE_INCHI>
InChI=1S/Rb/q+1

> <OPENEYE_INCHIKEY>
NCCSSGKUIKYAJD-UHFFFAOYSA-N

> <FORMULA>
Rb+

$$$$
