['CO', 'CC1(CNS(C)(=O)=O)CCCCC1', 'CS(N)(=O)=O', 'COC1CCC(C)(C)CC1', 'C[SH](=O)=O', 'COC1CCC(C)(CN)CC1', 'CNS(C)(=O)=O', 'COC1CCC(C)CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCCCC1.