['NS(=O)(=O)c1ccc(O)cc1', 'CCN(CC(C)C)CC(C)C', 'NS(=O)(=O)c1ccccc1', 'CC(C)CN(CCO)CC(C)C', 'CC(C)C', 'CC(C)CNCCOc1ccc(S(N)(=O)=O)cc1', 'CC(C)CNCC(C)C', 'CCOc1ccc(S(N)(=O)=O)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.