Using FC(F)(F)c1cc(Cl)ccc1CBr, O=C(Nc1cc[nH]n1)c1c(F)cccc1F to produce O=C(Nc1ccn(Cc2ccc(Cl)cc2C(F)(F)F)n1)c1c(F)cccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.