Using CCOC(=O)C1Oc2cc(C(=O)c3ccnn3-c3ccccn3)c(Cl)c(Cl)c2O1 to produce O=C(c1cc2c(c(Cl)c1Cl)OC(C(=O)O)O2)c1ccnn1-c1ccccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.