['CC(C)C=O', 'CC(C)(C)C(=O)NCCCC(=O)Nc1ccc(N)cc1', 'CC(C)(C)C(=O)NCCCC=O', 'CC(C)C(=O)Nc1ccc(N)cc1', 'CC(C)(C)C=O', 'CC(C)C(=O)Nc1ccc(NC(=O)CCCN)cc1', 'CC(C)(C)C(N)=O', 'CCCC(=O)Nc1ccc(NC(=O)C(C)C)cc1', 'CC(C)C(N)=O', 'CC(C)(C)C(=O)NCCCC(=O)Nc1ccccc1', 'CC(C)C(=O)Nc1ccccc1', 'CC(C)(C)C(=O)NCCCC(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.