Using N[C@@H](Cc1ccccc1)C(=O)OCc1ccccc1, O=C(O)C1CCCC1 to produce O=C(N[C@@H](Cc1ccccc1)C(=O)O)C1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.