Using O=C(OCc1ccccc1)[C@H]1CCCN1, O=C(O)[C@@H]1CCCC[C@H]1C(=O)O to produce O=C(O)C1CCCN1C(=O)[C@H]1CCCC[C@@H]1C(=O)N1CCC[C@@H]1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.