['CC(C)(C)N', 'COc1ccc(Cl)cc1NCCC=O', 'CO', 'CC(C)(C)NC(=O)CCNc1cccc(Cl)c1', 'CCC(=O)NC(C)(C)C', 'COc1ccc(Cl)cc1N', 'CC(C)C', 'COc1ccc(Cl)cc1NCCC(N)=O', 'COc1ccc(Cl)cc1', 'CC(C)(C)NC(=O)CCN']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.