['Cc1nc(C)c(C)o1', 'CS(=O)(=O)N1CCNCC1', 'C[SH](=O)=O', 'Cc1nc(CN2CCNCC2)oc1C', 'Cc1ncoc1C', 'CN1CCN(S(C)(=O)=O)CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1coc(CN2CCNCC2)n1.