['CC(C)(C)C(=O)NCC=O', 'CNCc1ccccc1OC(F)(F)F', 'CC(C)(C)C=O', 'CN(Cc1ccccc1OC(F)(F)F)C(=O)CN', 'OC(F)(F)F', 'CN(Cc1ccccc1)C(=O)CNC(=O)C(C)(C)C', 'Cc1ccccc1OC(F)(F)F', 'CNC(=O)CNC(=O)C(C)(C)C', 'CC(C)(C)C(N)=O', 'CC(=O)N(C)Cc1ccccc1OC(F)(F)F', 'FC(F)(F)Oc1ccccc1', 'CN(C)C(=O)CNC(=O)C(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.