['CC(C)CN(CC=O)CC(C)C', 'CN(C)C(=O)c1cccc(N)c1', 'CNC', 'CC(C)CN(CC(=O)Nc1cccc(C=O)c1)CC(C)C', 'CC(C)C', 'CC(C)CNCC(=O)Nc1cccc(C(=O)N(C)C)c1', 'CC(C)CNCC(C)C', 'CC(=O)Nc1cccc(C(=O)N(C)C)c1', 'CN(C)C(=O)c1ccccc1', 'CC(C)CN(CC(N)=O)CC(C)C', 'CN(C)C=O', 'CC(C)CN(CC(=O)Nc1ccccc1)CC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.