['O=[SH](=O)c1cncc(F)c1', 'CC1(C)CNC1c1cccs1', 'c1ccsc1', 'CC1(C)CN(S(=O)(=O)c2cncc(F)c2)C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1cccnc1)N1CCC1c1cccs1.