Using O=C(O)c1cc(Nc2ccc(Cl)cc2)c(C(=O)O)cc1Nc1ccc(Cl)cc1 to produce O=c1c2cc(Cl)ccc2[nH]c2cc3c(=O)c4cc(Cl)ccc4[nH]c3cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.