text: import molsys
  
  mol = molsys.mol.from_file("educt_0.xyz")
  mol.detect_conn()
  mol.addon("obabel")
  smiles = mol.obabel.cansmiles
  is_chiral, centers = mol.obabel.check_chirality()
  
  assert is_chiral == True, "check chirality"
  assert smiles == "[O]Oc1cc2[C@@H]([O])C=C[CH]c2c2c1cccc2", "SMILES string"
  