Using COc1ccc(C(=O)CN2CCC(N3Cc4ccccc4NC3=O)CC2)cc1OC to produce COc1ccc(C(O)CN2CCC(N3Cc4ccccc4NC3=O)CC2)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.