Using O=C(Nc1ccc(Oc2ccnc(NC(=O)N3CCC(N4CCC4)CC3)c2)cc1F)OCc1ccccc1 to produce Nc1ccc(Oc2ccnc(NC(=O)N3CCC(N4CCC4)CC3)c2)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.