Using COC(=O)CCc1ccc(C(=O)N2CCCCc3ccccc32)cc1 to produce O=C(O)CCc1ccc(C(=O)N2CCCCc3ccccc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.