2-oxo-2H-pyran-4,6-dicarboxylate
  CDK    2/12/10,15:27

 13 13  0  0  0  0  0  0  0  0999 V2000
    5.2275   -6.9924    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.6564   -6.9924    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.9419   -6.5799    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.2275   -7.8174    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.6564   -5.3424    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.9419   -5.7549    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.2275   -5.3424    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.7985   -7.8174    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.5130   -8.2299    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.5130   -9.0549    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    6.6564   -7.8174    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.3709   -8.2299    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.9419   -8.2299    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  3  1  1  0  0  0  0 
  3  2  2  0  0  0  0 
  1  4  2  0  0  0  0 
  4 13  1  0  0  0  0 
 13 11  1  0  0  0  0 
 11  2  1  0  0  0  0 
  3  6  1  0  0  0  0 
  4  9  1  0  0  0  0 
  6  5  2  0  0  0  0 
  6  7  1  0  0  0  0 
  9  8  2  0  0  0  0 
  9 10  1  0  0  0  0 
 11 12  2  0  0  0  0 
M  CHG  1   7  -1
M  CHG  1  10  -1
M  END