graphkit-learn/datasets/Acyclic/1-ethylpropyl_methyl_sulfide.ct

 7 6
    0.0000    0.0000    0.0000 C
    0.0000    0.0000    0.0000 C
    0.0000    0.0000    0.0000 C
    0.0000    0.0000    0.0000 C
    0.0000    0.0000    0.0000 C
    0.0000    0.0000    0.0000 C
    0.0000    0.0000    0.0000 S
  1  4  1  1
  2  5  1  1
  3  7  1  1
  4  6  1  1
  5  6  1  1
  6  7  1  1