Using COc1cc2c(cc1OC)C(=O)C(CN1CCN(c3ccccc3OC)CC1)C2 to produce COc1cc2c(cc1OC)C(O)C(CN1CCN(c3ccccc3OC)CC1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.