['CNC', 'O=CN1CCN(C(=O)C[C@H]2CCOC2)CC1', 'CN(C)C=O', 'O=C(C[C@H]1CCOC1)N1CCNCC1', 'O=CC[C@H]1CCOC1', 'CN(C)C(=O)N1CCNCC1', 'C1CCOC1', 'CC(=O)N1CCN(C(=O)N(C)C)CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(C[C@H]1CCOC1)N1CCNCC1.