['CC(N)C(=O)NC(C)(C)C', 'COc1ccc(Br)c(C=O)c1', 'CC(C)(C)N', 'COc1ccc(Br)c(C(=O)NC(C)C=O)c1', 'CO', 'CC(NC(=O)c1ccccc1Br)C(=O)NC(C)(C)C', 'CCC(=O)NC(C)(C)C', 'COc1ccc(Br)c(C(N)=O)c1', 'CC(C)C', 'COc1ccc(Br)c(C(=O)NC(C)C(N)=O)c1', 'COc1ccc(Br)cc1', 'CC(NC=O)C(=O)NC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.