Using CC(C)(C)OC(=O)NC[C@H](NC(=O)OCC12CC3CC(CC(C3)C1)C2)C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)[C@H](CN)NC(=O)OCC12CC3CC(CC(C3)C1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.