['CNC1(C#N)CCCCC1', 'C[C@@H]1CN([C@@H](C)C=O)C[C@@H](C)O1', 'C[C@@H]1CNC[C@@H](C)O1', 'CCC(=O)N(C)C1(C#N)CCCCC1', 'N#CC1CCCCC1', 'CNC(=O)[C@H](C)N1C[C@@H](C)O[C@H](C)C1', 'N#CC1CCCCC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(CN1CCOCC1)NC1CCCCC1.