['C[C@@H]1COCCN1', 'O=[SH](=O)c1ccccc1-c1ccno1', 'c1cnoc1', 'C[C@@H]1COCCN1S(=O)(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1ccccc1-c1ccno1)N1CCOCC1.