Using COC(=O)c1cc2c(Cl)c(Oc3ccc(OC)c(C(C)C)c3)c(Cl)cc2n1C to produce COC(=O)c1cc2c(Cl)c(Oc3ccc(O)c(C(C)C)c3)c(Cl)cc2n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.