Using OB(O)c1ccc(F)c(Cl)c1, O=C1CN(C(=O)c2cc(Br)c(-c3cccc(Cl)c3)s2)CN1 to produce O=C1CN(C(=O)c2cc(-c3ccc(F)c(Cl)c3)c(-c3cccc(Cl)c3)s2)CN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.