Using COC(=O)C(=O)c1ccc(OCC(=O)NC2CCCCCCC2)cc1 to produce O=C(COc1ccc(C(=O)C(=O)O)cc1)NC1CCCCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.