['Cc1ccc(O)cc1', 'CCN(C)CCOC(C)(C)C', 'CC(C)(C)O', 'CCN(C)CCOc1ccc(C)cc1', 'CC(C)C', 'Cc1ccc(OCCN(C)CCO)cc1', 'Cc1ccccc1', 'CN(CCO)CCOC(C)(C)C', 'CNCCOC(C)(C)C', 'CCOc1ccc(C)cc1', 'CCOC(C)(C)C', 'CNCCOc1ccc(C)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.