['FC(F)F', 'Nc1n[nH]cc1Cc1ccccc1', 'Cc1ccccc1', 'Nc1cc(C(F)(F)F)[nH]n1', 'c1ccccc1', 'Cc1c(N)n[nH]c1C(F)(F)F']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(Cc2cn[nH]c2)cc1.