SO4
  -OEChem-04192423353D

  5  4  0     0  0  0  0  0  0999 V2000
   16.4850   34.9240    5.5750 S   0  0  0  0  0  0  0  0  0  0  0  0
   17.7410   34.8910    4.8260 O   0  0  0  0  0  0  0  0  0  0  0  0
   16.7870   35.8260    6.7330 O   0  0  0  0  0  0  0  0  0  0  0  0
   15.4400   35.5510    4.4010 O   0  5  0  0  0  0  0  0  0  0  0  0
   16.1410   33.7200    5.9300 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-]S(=O)(=O)[O-]

> <OPENEYE_INCHI>
InChI=1S/H2O4S/c1-5(2,3)4/h(H2,1,2,3,4)/p-2

> <OPENEYE_INCHIKEY>
QAOWNCQODCNURD-UHFFFAOYSA-L

> <FORMULA>
O4S-2

$$$$