['CC#N', 'O=S(=O)(c1c(Cl)cc(Br)cc1Cl)N1CCNCC1', 'N#CCN1CCNCC1', 'O=[SH](=O)c1c(Cl)cc(Br)cc1Cl']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1ccccc1)N1CCNCC1.