['CC(C)(C)NCC=O', 'Nc1ccc(OCC(F)(F)F)nc1', 'CC(F)(F)F', 'CC(C)(C)NCC(=O)Nc1ccc(O)nc1', 'OCC(F)(F)F', 'CC(C)(C)NCC(=O)Nc1cccnc1', 'CC(C)C', 'NCC(=O)Nc1ccc(OCC(F)(F)F)nc1', 'CC(C)(C)N', 'CC(=O)Nc1ccc(OCC(F)(F)F)nc1', 'CC(C)(C)NCC(N)=O', 'FC(F)(F)COc1ccccn1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccncc1.