Using O=C(O)c1ccc(/C=C\C(c2cc(Cl)c(Cl)c(Cl)c2)C(F)(F)F)cc1Br, NCC(=O)NCC(F)(F)F to produce O=C(CNC(=O)c1ccc(/C=C\C(c2cc(Cl)c(Cl)c(Cl)c2)C(F)(F)F)cc1Br)NCC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.