Using COc1ccc(OCc2ccccc2)c(C(=O)Nc2ccc(Oc3ccccc3)cc2)n1 to produce COc1ccc(O)c(C(=O)Nc2ccc(Oc3ccccc3)cc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.