Using O=C(O)CC(F)(F)F, NCc1ccc(N2CCC(c3cc(C(F)(F)F)cc(C(F)(F)F)c3)(C(F)(F)F)C2O)nc1Br to produce O=C(CC(F)(F)F)NCc1ccc(N2CCC(c3cc(C(F)(F)F)cc(C(F)(F)F)c3)(C(F)(F)F)C2O)nc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.