['CN', 'O=CCCC1CCCCN1C(=O)C[C@H]1CCOC1', 'O=CC[C@H]1CCOC1', 'CNC(=O)CCC1CCCCN1', 'CCC(=O)NC', 'O=C(C[C@H]1CCOC1)N1CCCCC1', 'C1CCOC1', 'CNC(=O)CCC1CCCCN1C(C)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(C[C@H]1CCOC1)N1CCCCC1.