WO4
  -OEChem-04192423363D

  5  4  0     0  0  0  0  0  0999 V2000
    7.8130   23.3480   15.2890 W   0  0  0  0  0  0  0  0  0  0  0  0
    6.0790   23.3110   14.9030 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.2600   24.8600   16.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.2350   22.0710   16.4350 O   0  5  0  0  0  0  0  0  0  0  0  0
    8.7940   23.1080   13.8340 O   0  5  0  0  0  0  0  0  0  0  0  0
  1  2  2  0  0  0  0
  1  3  2  0  0  0  0
  1  4  1  0  0  0  0
  1  5  1  0  0  0  0
M  CHG  2   4  -1   5  -1
M  END
> <OPENEYE_ISO_SMILES>
[O-][W](=O)(=O)[O-]

> <OPENEYE_INCHI>
InChI=1S/4O.W/q;;2*-1;

> <OPENEYE_INCHIKEY>
PBYZMCDFOULPGH-UHFFFAOYSA-N

> <FORMULA>
O4W-2

$$$$