Using COC(=O)C1CCCC(CC=O)N1C(=O)OCc1ccccc1, COC(OC)OC to produce COC(=O)C1CCCC(CC(OC)OC)N1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.