['CC(C)C', 'O=S(=O)(Cc1ccon1)N1Cc2ccccc2CO1', 'CC(C)(C)c1ccno1', 'CS(=O)(=O)N1Cc2ccccc2CO1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(Cc1ccon1)N1Cc2ccccc2CO1.