['CC=O', 'Cc1ccc(S(=O)(=O)[C@H](N)C(=O)c2cccs2)cc1', 'CC(N)=O', 'Cc1ccc(S(=O)(=O)CC(=O)c2cccs2)cc1', 'c1ccsc1', 'CC(=O)N[C@H](C=O)S(=O)(=O)c1ccc(C)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(CS(=O)(=O)c1ccccc1)c1cccs1.