['CO', 'NC(=O)[C@@H]1CCCN1S(=O)(=O)CCC1CC1', 'O=[SH](=O)CCC1CC1', 'CO[C@@H]1CN[C@H](C(N)=O)C1', 'NC=O', 'CO[C@H]1CCN(S(=O)(=O)CCC2CC2)C1', 'C1CC1', 'CCS(=O)(=O)N1C[C@@H](OC)C[C@H]1C(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(CCC1CC1)N1CCCC1.