Using NCCC(=O)OCc1ccccc1, O=C(O)CN1CC(=O)OC(=O)C1 to produce O=C(O)CN(CC(=O)O)CC(=O)NCCC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.