['C1CCNC1', 'Cc1csc(-c2cccc([SH](=O)=O)c2)n1', 'Cc1cscn1', 'O=S(=O)(c1ccccc1)N1CCCC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1cccc(-c2nccs2)c1)N1CCCC1.