Using O=C(Cl)c1c(F)cccc1F, Nc1ccn(Cc2cccc(F)c2)c(=O)c1Br to produce O=C(Nc1ccn(Cc2cccc(F)c2)c(=O)c1Br)c1c(F)cccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.