['CCCc1nc(C)no1', 'CC1(C)CS(=O)CCN1', 'CCC', 'CC1(C)CS(=O)CCN1Cc1ncon1', 'CCCc1ncno1', 'CN1CCS(=O)CC1(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S1CCN(Cc2ncon2)CC1.