['CCCCCC', 'O=[N+]([O-])c1cc(S(=O)(=O)Oc2ccc(O)cc2)ccc1Cl', 'CCCCCCO', 'O=[N+]([O-])c1cc(S(=O)(=O)Oc2ccccc2)ccc1Cl', 'CCCCCCOc1ccccc1', 'O=[N+]([O-])c1cc(S(=O)(=O)O)ccc1Cl']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(Oc1ccccc1)c1ccccc1.