Using CC(C)CC=O, CC[C@H](C)[C@H](NC(=O)OC)C(=O)NNC[C@H](O)[C@H](Cc1ccccc1)NC(=O)[C@H]([C@@H](C)CC)N1CCN(Cc2cccc(C)n2)C1=O to produce CC[C@H](C)[C@H](NC(=O)OC)C(=O)NN(CCC(C)C)C[C@H](O)[C@H](Cc1ccccc1)NC(=O)[C@H]([C@@H](C)CC)N1CCN(Cc2cccc(C)n2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.