Using CC(C)[C@H](NC(=O)[C@H](CC(=O)OC(C)(C)C)NC(=O)CN(C)C(=O)OCc1ccccc1)C(=O)OC(C)(C)C to produce CNCC(=O)N[C@@H](CC(=O)OC(C)(C)C)C(=O)N[C@H](C(=O)OC(C)(C)C)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.