Using C[C@@H](c1ccccc1)N1C[C@@H]2CCN(C(=O)OC(C)(C)C)C[C@@H]21 to produce CC(C)(C)OC(=O)N1CC[C@H]2CN[C@H]2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.