Using N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O, O=C(CCCc1ccccc1)ON1C(=O)CCC1=O to produce O=C(CCCc1ccccc1)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.