Using COC(=O)c1ccc(Cn2c(=Nc3ccc(OC)cc3)n(C)c3cc(Cl)c(Cl)cc32)cc1 to produce COC(=O)c1ccc(Cn2c(=Nc3ccc(O)cc3)n(C)c3cc(Cl)c(Cl)cc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.