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