OKG
  -OEChem-11082419103D

 14 13  0     0  0  0  0  0  0999 V2000
   -3.4600   -0.7230    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3680    0.0580   -0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4850    1.2610   -0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9960   -0.5650    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0650    0.5380   -0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4370   -0.0850    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5550   -1.2880    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.6470    0.1160   -0.0000 O   0  5  0  0  0  0  0  0  0  0  0  0
    2.5290    0.6960   -0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -4.3180   -0.2770    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8770   -1.1830    0.8900 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8770   -1.1830   -0.8900 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0530    1.1560   -0.8900 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0530    1.1560    0.8900 H   0  0  0  0  0  0  0  0  0  0  0  0
  8  9  1  0  0  0  0
  6  9  1  0  0  0  0
  6  7  2  0  0  0  0
  5  6  1  0  0  0  0
  4  5  1  0  0  0  0
  2  4  1  0  0  0  0
  2  3  2  0  0  0  0
  1  2  1  0  0  0  0
  1 10  1  0  0  0  0
  4 11  1  0  0  0  0
  4 12  1  0  0  0  0
  5 13  1  0  0  0  0
  5 14  1  0  0  0  0
M  CHG  1   8  -1
M  END
> <OPENEYE_ISO_SMILES>
C(CC(=O)O[O-])C(=O)O

> <OPENEYE_INCHI>
InChI=1S/C4H6O5/c5-3(6)1-2-4(7)9-8/h8H,1-2H2,(H,5,6)/p-1

> <OPENEYE_INCHIKEY>
WBOQHFMXKCEWSQ-UHFFFAOYSA-M

> <FORMULA>
C4H5O5-

$$$$