['Oc1ccc(F)cc1', 'C[C@@H](O)CN1CCOCC1', 'Fc1ccccc1', 'OC[C@@H](O)CN1CCOCC1', 'C1COCCN1', 'C[C@H](O)COc1ccc(F)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(OCCCN2CCOCC2)cc1.