Using COc1cc(OC)cc(C2(O)C(=O)Nc3cc(Cl)ccc32)c1 to produce COc1cc(OC)cc(C2C(=O)Nc3cc(Cl)ccc32)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.