['CN', 'CC(C=O)COCc1ccccc1', 'CNC(=O)C(C)C', 'OCc1ccccc1', 'Cc1ccccc1', 'CNC(=O)C(C)CO', 'c1ccccc1', 'CNC(=O)C(C)COC']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.