3SY - Ideal conformer
     RDKit          3D

 21 20  0  0  0  0  0  0  0  0999 V2000
   -2.4160    0.0000    0.0580 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2490    0.0000    0.8830 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    0.0000   -0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.2490   -0.0000    0.8830 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.4160   -0.0000    0.0580 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0000   -1.2490   -0.8830 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0000   -2.4160   -0.0580 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    1.2490   -0.8830 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    2.4160   -0.0580 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.2470    0.0000    0.5530 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2490    0.8900    1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2490   -0.8900    1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.2490    0.8900    1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.2490   -0.8900    1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.2470   -0.0000    0.5530 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8900   -1.2490   -1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.8900   -1.2490   -1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0000   -3.2470   -0.5530 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.8900    1.2490   -1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8900    1.2490   -1.5130 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    3.2470   -0.5530 H   0  0  0  0  0  0  0  0  0  0  0  0
  5  4  1  0
  8  9  1  0
  8  3  1  0
  4  3  1  0
  3  2  1  0
  3  6  1  0
  2  1  1  0
  6  7  1  0
  1 10  1  0
  2 11  1  0
  2 12  1  0
  4 13  1  0
  4 14  1  0
  5 15  1  0
  6 16  1  0
  6 17  1  0
  7 18  1  0
  8 19  1  0
  8 20  1  0
  9 21  1  0
M  END
$$$$
