O4.mol
  -ISIS-            3D

  4  4  0  0  0  0  0  0  0  0  0
   -1.0220   -0.0550    0.1893 O   0  0  0  0  0
    1.0225   -0.0549    0.1895 O   0  0  0  0  0
   -0.0003    1.0373    0.0951 O   0  0  0  0  0
    0.0000   -0.9271   -0.4739 O   0  0  0  0  0
  1  3  1  0  0  0
  1  4  1  0  0  0
  2  3  1  0  0  0
  2  4  1  0  0  0