81-65-2.MOL
  ChemDraw11112000592D
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  1  2  1  0      
  2  3  2  0      
  3  4  1  0      
  4  5  2  0      
  5  6  1  0      
  6  7  1  0      
  7  8  1  0      
  8  9  2  0      
  9 10  1  0      
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 12 13  1  0      
 13 14  1  0      
  5 14  1  0      
  1 14  2  0      
 13 15  2  0      
  6 16  2  0      
 17 18  2  0      
 17 19  1  0      
  4 17  1  0      
  1 20  1  0      
M  CHG  2  17   1  19  -1
M  END