['O=[N+]([O-])c1ccc([SH](=O)=O)cc1', 'CC1CCC(C)N1C1CCCNC1', 'CC1CCC(C)N1', 'O=[N+]([O-])c1ccc(S(=O)(=O)N2CCCCC2)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1ccccc1)N1CCCC(N2CCCC2)C1.