Using COc1c(OCc2ccccc2)ccc2c(=O)c(-c3ccc(Cl)cc3)c(C(C)C)oc12 to produce COc1c(O)ccc2c(=O)c(-c3ccc(Cl)cc3)c(C(C)C)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.