Using CCOc1c(OC)c2c(c(OC)c1C(=O)C=Cc1ccc(OC)cc1)CC(N1CCCCC1)O2 to produce CCOc1c(OC)c2c(c(OC)c1C(O)CCc1ccc(OC)cc1)CC(N1CCCCC1)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.