Using S=C=Nc1c(Cl)cccc1Cl, CNc1ccc(C(=O)OC)cc1N to produce O=C(O)c1ccc2[nH]c(Nc3c(Cl)cccc3Cl)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.