['O=[SH](=O)c1cccs1', 'CON(C)S(=O)(=O)c1ccc(N)cc1', 'NS(=O)(=O)c1cccs1', 'CON(C)S(=O)(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(Nc1ccccc1)c1cccs1.