Using O=C(c1nc2cc(Cl)c(Cl)cc2[nH]1)C(F)(F)F, C/C=C/Br to produce C/C=C/C(O)(c1nc2cc(Cl)c(Cl)cc2[nH]1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.