Using N=C(N)c1sc(Br)nc1-c1ccc(Cl)cc1Cl, CC(=O)CCl to produce Cc1c[nH]c(-c2sc(Br)nc2-c2ccc(Cl)cc2Cl)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.