Using CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)ON1C(=O)CCC1=O, CC(C)(C)OC(=O)[C@@H](N)CCC(=O)O to produce CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)N[C@@H](CCC(=O)O)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.