['CC(C=O)S(C)(=O)=O', 'CCOC1CCCNC1', 'CC', 'CC(C(=O)N1CCCC(O)C1)S(C)(=O)=O', 'CCO', 'CC(C(=O)N1CCCCC1)S(C)(=O)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCNCC1.