['CC(C)(C)O', 'CCN(C)C1CCCCC1', 'CC(C)C', 'CN(CCO)C1CCCCC1', 'CCOC(C)(C)C', 'CNC1CCCCC1', 'C1CCCCC1', 'CNCCOC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCCCC1.