['CCCc1nc(C)no1', 'CC1CNCC(C)S1=O', 'CCC', 'CC1CN(Cc2ncon2)CC(C)S1=O', 'CCCc1ncno1', 'CC1CN(C)CC(C)S1=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S1CCN(Cc2ncon2)CC1.