Using CCOC(=O)Cn1nc(Cc2c(Cl)cncc2Cl)c2ccc(OC)cc2c1=O to produce COc1ccc2c(Cc3c(Cl)cncc3Cl)nn(CC(=O)O)c(=O)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.