Using COC(=O)[C@H](Cc1c[nH]c2ccccc12)NC(=O)OC(C)(C)C, CC(C)(C)OC(=O)CBr to produce COC(=O)[C@H](Cc1cn(CC(=O)OC(C)(C)C)c2ccccc12)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.