Using Fc1ccc(Nc2ccc(Br)cn2)c(F)c1, O=Cc1cc(Br)ccc1Cl to produce OC(c1ccc(Nc2ccc(F)cc2F)nc1)c1cc(Br)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.