['[O-][n+]1ccccc1S', 'CCc1cccc([N+](=O)[O-])c1', 'O=[N+]([O-])c1ccccc1', 'CCSc1cccc[n+]1[O-]', '[O-][n+]1ccccc1', 'C[C@@H](S)c1cccc([N+](=O)[O-])c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(CSc2cccc[nH+]2)cc1.