['C[SH](=O)=O', 'CC1CCCN(S(=O)(=O)NC2CCCNC2)C1', 'CS(=O)(=O)N1CCCCC1', 'CC1CCCN(S(N)(=O)=O)C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(NC1CCCNC1)N1CCCCC1.