Using N=C(N)NN=C(Cc1c(F)ccc(F)c1F)c1cc(Cl)ccc1Br to produce N=C(N)n1nc(Cc2c(F)ccc(F)c2F)c2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.