Using COc1ccc(CNc2nc(Cl)ncc2C(O)c2ccccn2)cc1Cl to produce COc1ccc(CNc2nc(Cl)ncc2C(=O)c2ccccn2)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.