['CC(C)S(=O)(=O)CC=O', 'CS(=O)(=O)N1CCCC(N)C1', 'C[SH](=O)=O', 'CC(C)S(=O)(=O)CC(=O)NC1CCCNC1', 'CC(C)S(=O)(=O)CC(N)=O', 'CS(=O)(=O)N1CCCCC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCNCC1.