['Cc1ccc(N)cc1F', 'CC(C)(C)C(=O)NCCCC=O', 'CC(C)(C)C=O', 'Cc1ccc(NC(=O)CCCN)cc1F', 'CC(C)(C)C(N)=O', 'CCCC(=O)Nc1ccc(C)c(F)c1', 'Cc1ccccc1F', 'CC(C)(C)C(=O)NCCCC(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.