Using CCOc1ccc(COc2ccc3oc(C(C)NC(=O)CCCC(=O)OC)cc3c2)cc1 to produce CCOc1ccc(COc2ccc3oc(C(C)NC(=O)CCCC(=O)O)cc3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.