['C=CCNCC=C', 'CC(C)(CC(=O)O)CC(=O)Nc1ccc(C=O)cc1', 'CC(C)(CC=O)CC(=O)O', 'C=CCN(CC=C)C(=O)c1ccc(N)cc1', 'C=CC', 'C=CCNC(=O)c1ccc(NC(=O)CC(C)(C)CC(=O)O)cc1', 'CC(C)(CC(N)=O)CC(=O)O', 'C=CCN(CC=C)C(=O)c1ccccc1', 'C=CCN(C=O)CC=C', 'CC(C)(CC(=O)O)CC(=O)Nc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.