['CNC', 'N=C1S[C@H]2CS(=O)(=O)C[C@@H]2N1c1ccccc1', 'CN(C)c1ccccc1', 'N=C1N[C@H]2CS(=O)(=O)C[C@@H]2S1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is N=C1S[C@H]2CS(=O)(=O)C[C@@H]2N1c1ccccc1.