Barbital.mol
  ChemDraw02200317452D

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  1  2  1  0      
  1  3  1  0      
  3  4  1  0      
  4  5  1  0      
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  2  7  2  0      
  5  8  2  0      
  3  9  2  0      
  4 10  1  0      
  4 11  1  0      
 11 12  1  0      
 10 13  1  0      
M  END