2FU
  -OEChem-05032420343D

 10  9  0     0  0  0  0  0  0999 V2000
  -39.5880   -3.6790  104.4390 C   0  0  0  0  0  0  0  0  0  0  0  0
  -39.9100   -2.4650  106.4200 O   0  0  0  0  0  0  0  0  0  0  0  0
  -40.3120   -3.3800  105.6760 C   0  0  0  0  0  0  0  0  0  0  0  0
  -37.4890   -3.4800  103.1030 C   0  0  0  0  0  0  0  0  0  0  0  0
  -38.4040   -2.9730  104.1260 C   0  0  0  0  0  0  0  0  0  0  0  0
  -37.6140   -4.6400  102.6820 O   0  0  0  0  0  0  0  0  0  0  0  0
  -39.9400   -4.4480  103.7310 H   0  0  0  0  0  0  0  0  0  0  0  0
  -41.2150   -3.8740  106.0710 H   0  0  0  0  0  0  0  0  0  0  0  0
  -36.6500   -2.9530  102.6170 H   0  0  0  0  0  0  0  0  0  0  0  0
  -38.1960   -2.0380  104.6730 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  3  1  0  0  0  0
  1  5  2  0  0  0  0
  1  7  1  0  0  0  0
  2  3  2  0  0  0  0
  3  8  1  0  0  0  0
  4  5  1  0  0  0  0
  4  6  2  0  0  0  0
  4  9  1  0  0  0  0
  5 10  1  0  0  0  0
M  END
> <OPENEYE_ISO_SMILES>
C(=C/C=O)\C=O

> <OPENEYE_INCHI>
InChI=1S/C4H4O2/c5-3-1-2-4-6/h1-4H/b2-1+

> <OPENEYE_INCHIKEY>
JGEMYUOFGVHXKV-OWOJBTEDSA-N

> <FORMULA>
C4H4O2

$$$$