Using O=C1CC[C@@H](NC(=O)[C@H](CCCCNC(=O)OCc2ccccc2)NC(=O)c2cccnc2)C(=O)O1, O=C(O)[C@@H]1C[C@@H]2CCCC[C@@H]2N1 to produce O=C(NCCCC[C@H](NC(=O)c1cccnc1)C(=O)N[C@H](CCC(=O)N1[C@H](C(=O)O)C[C@@H]2CCCC[C@@H]21)C(=O)O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.