['CC(N)C(=O)NC(C)(C)C', 'CCCS(=O)(=O)c1ccccc1C=O', 'CC(C)(C)N', 'CCCS(=O)(=O)c1ccccc1C(=O)NC(C)C=O', 'CCC(=O)NC(C)(C)C', 'CCCS(=O)(=O)c1ccccc1C(N)=O', 'CC(C)C', 'CCCS(=O)(=O)c1ccccc1C(=O)NC(C)C(N)=O', 'CC(NC=O)C(=O)NC(C)(C)C', 'CCCS(=O)(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.