Using CCOC(=O)C(C(=O)Nc1c(OC)cc(OC)cc1OC)c1ccccc1 to produce COc1cc(OC)c(NC(=O)C(C(=O)O)c2ccccc2)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.