['CC(N)C(=O)NC(C)(C)C', 'COc1ccc(C=O)cc1Br', 'CC(C)(C)N', 'COc1ccc(C(=O)NC(C)C=O)cc1Br', 'CO', 'CC(NC(=O)c1cccc(Br)c1)C(=O)NC(C)(C)C', 'CCC(=O)NC(C)(C)C', 'COc1ccc(C(N)=O)cc1Br', 'CC(C)C', 'COc1ccc(C(=O)NC(C)C(N)=O)cc1Br', 'COc1ccccc1Br', 'CC(NC=O)C(=O)NC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.