SE4
  -OEChem-04262420173D

  5  4  0     0  0  0  0  0  0999 V2000
   34.9550   14.5020   18.9770 Se  0  0  0  0  0  0  0  0  0  0  0  0
   36.1820   15.0900   19.7150 O   0  0  0  0  0  0  0  0  0  0  0  0
   33.7880   15.5320   19.0710 O   0  0  0  0  0  0  0  0  0  0  0  0
   34.5550   13.2510   19.7070 O   0  5  0  0  0  0  0  0  0  0  0  0
   35.3390   14.2190   17.5330 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-][Se](=O)(=O)[O-]

> <OPENEYE_INCHI>
InChI=1S/H2O4Se/c1-5(2,3)4/h(H2,1,2,3,4)/p-2

> <OPENEYE_INCHIKEY>
QYHFIVBSNOWOCQ-UHFFFAOYSA-L

> <FORMULA>
O4Se-2

$$$$