['CCC', 'Cc1cc(CS(=O)(=O)c2nnc(N)s2)no1', 'CCCN', 'Cc1cc(CS(=O)(=O)c2nncs2)no1', 'Cc1ccno1', 'CCCNc1nnc(S(C)(=O)=O)s1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(Cc1ccon1)c1nncs1.