Using COc1cccc(C2COC(=O)N2c2ccc(Oc3ccc(Cl)cc3)cc2)c1 to produce COc1cccc(C(CO)Nc2ccc(Oc3ccc(Cl)cc3)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.