Using O=C(Nc1ccccc1O)c1cc(Cl)c(O)c(Cl)c1, O=C(Cl)c1ccccc1 to produce O=C(Nc1ccccc1OC(=O)c1ccccc1)c1cc(Cl)c(OC(=O)c2ccccc2)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.