['Nc1ccccc1C(F)(F)F', 'CCOC(CC)C(=O)C(C#N)C=O', 'CC', 'CCC(O)C(=O)C(C#N)C(=O)Nc1ccccc1C(F)(F)F', 'CCO', 'CCCC(=O)C(C#N)C(=O)Nc1ccccc1C(F)(F)F', 'FC(F)(F)c1ccccc1', 'CCOC(CC)C(=O)C(C#N)C(N)=O', 'FC(F)F', 'CCOC(CC)C(=O)C(C#N)C(=O)Nc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.