['CC(C)(C)N', 'O=CCNC(=O)c1ccc(C(F)(F)F)nc1', 'CC(C)(C)NC(=O)CN', 'O=Cc1ccc(C(F)(F)F)nc1', 'CC(C)C', 'NC(=O)CNC(=O)c1ccc(C(F)(F)F)nc1', 'CC(=O)NC(C)(C)C', 'NC(=O)c1ccc(C(F)(F)F)nc1', 'FC(F)(F)c1ccccn1', 'CC(C)(C)NC(=O)CNC=O', 'FC(F)F', 'CC(C)(C)NC(=O)CNC(=O)c1cccnc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccncc1.