['CC(C)CC=O', 'Cc1cc(C)c(S(=O)(=O)N2CCNCC2)c(C)c1', 'CC(C)CC(=O)N1CCNCC1', 'Cc1cc(C)c([SH](=O)=O)c(C)c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1ccccc1)N1CCNCC1.