['CNC', 'O=[SH](=O)[C@@H]1CN(c2nnc(C3CC3)o2)C[C@H]1C(F)(F)F', 'c1nnc(C2CC2)o1', 'CN(C)S(=O)(=O)[C@@H]1CNC[C@H]1C(F)(F)F', 'FC(F)F', 'CN(C)S(=O)(=O)[C@H]1CCN(c2nnc(C3CC3)o2)C1', 'C1CC1', 'CN(C)S(=O)(=O)[C@@H]1CN(c2nnco2)C[C@H]1C(F)(F)F']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCN(c2nnc(C3CC3)o2)C1.