Using CC(C)C[C@@H](C(=O)NN(CC(C)C)C(=O)[C@@H](C)NC(=O)OCc1ccccc1)C(CCCc1ccccc1)C(=O)NOCc1ccccc1 to produce CC(C)C[C@@H](C(=O)NN(CC(C)C)C(=O)[C@@H](C)N)C(CCCc1ccccc1)C(=O)NO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.