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