['NS(=O)(=O)c1cnc[nH]1', 'CC(C)[C@@H]1C[C@@H](C)c2ccccc21', 'O=[SH](=O)c1cnc[nH]1', 'CC(C)[C@@H]1C[C@@H](CN)c2ccccc21']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(NC[C@@H]1CCc2ccccc21)c1cnc[nH]1.