['CN(C)CC=O', 'O=S(=O)(C1COC1)N1CCNCC1', 'CNC', 'CC(=O)N1CCN(S(=O)(=O)C2COC2)CC1', 'O=[SH](=O)C1COC1', 'CN(C)CC(=O)N1CCNCC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(C1COC1)N1CCNCC1.