Using CCOC(=O)Cn1cc(C[C@@H](NC(=O)[C@@H](NC(C)=O)[C@@H](C)O)C(=O)N[C@@H](Cc2ccccc2)C(=O)N(C)Cc2ccccc2)c2ccccc21 to produce CC(=O)N[C@H](C(=O)N[C@H](Cc1cn(CC(=O)O)c2ccccc12)C(=O)N[C@@H](Cc1ccccc1)C(=O)N(C)Cc1ccccc1)[C@@H](C)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.