SO3
  -OEChem-05032420403D

  4  3  0     0  0  0  0  0  0999 V2000
   -6.0090    0.7850   17.4660 S   0  0  0  0  0  0  0  0  0  0  0  0
   -4.8100    1.6110   17.3490 O   0  0  0  0  0  0  0  0  0  0  0  0
   -7.0980    1.2470   16.5890 O   0  5  0  0  0  0  0  0  0  0  0  0
   -5.2900   -0.3840   16.2640 O   0  5  0  0  0  0  0  0  0  0  0  0
  1  2  2  0  0  0  0
  1  3  1  0  0  0  0
  1  4  1  0  0  0  0
M  CHG  2   3  -1   4  -1
M  END
> <OPENEYE_ISO_SMILES>
[O-]S(=O)[O-]

> <OPENEYE_INCHI>
InChI=1S/H2O3S/c1-4(2)3/h(H2,1,2,3)/p-2

> <OPENEYE_INCHIKEY>
LSNNMFCWUKXFEE-UHFFFAOYSA-L

> <FORMULA>
O3S-2

$$$$
