Using O=C(Nc1cc(Cl)c(O)c(Cl)c1)c1ccccc1O, O=C(Cl)c1ccccc1 to produce O=C(Oc1ccccc1C(=O)Nc1cc(Cl)c(OC(=O)c2ccccc2)c(Cl)c1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.