Using Cc1ccc(Cl)c(Nc2ccccc2CON)c1Cl, O=CC(=O)O to produce Cc1ccc(Cl)c(Nc2ccccc2CON=CC(=O)O)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.