['NCC1=CCCOC1', 'O=CC[C@H]1CCCC[C@@H]1O', 'CC1=CCCOC1', 'NC(=O)C[C@H]1CCCC[C@@H]1O', 'OC1CCCCC1', 'CC(=O)NCC1=CCCOC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(CC1CCCCC1)NCC1=CCCOC1.