ChemicalBook -- 67321-81-7
  -INDIGO-05172401442D
  2  1  0  0  0  0  0  0  0  0999 V2000
    0.0000    0.0000    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.5400    0.0000    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0  0  0  0
M  ISO  2   1  17   2  17
M  END