IUM
  Converted by convert_cif2sdf.py  2026/01/30 11:05:38

  3  2  0  0  0  0  0  0  0  0999 V2000
    0.0000    0.0000    0.0000 U   0  0  0  0  0
    2.2200    0.0000    0.0000 O   0  5  0  0  0
   -2.2200    0.0000    0.0000 O   0  5  0  0  0
  1  2  1  0  0  0
  1  3  1  0  0  0
M  END
$$$$