['CC(O)CS(C)(=O)=O', 'OC(c1ccccc1)c1ccccc1', 'CS(=O)(=O)CC(O)CO', 'c1ccc(Cc2ccccc2)cc1', 'c1ccccc1', 'CS(=O)(=O)CC(O)COCc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(Cc2ccccc2)cc1.