Using O=C(Nc1cc(C(=O)Oc2ccccc2)n(-c2ncccc2Cl)n1)OCc1ccccc1 to produce Nc1cc(C(=O)Oc2ccccc2)n(-c2ncccc2Cl)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.