Using CC(C)(C)OC(=O)N1[C@H](CN)C[C@@H]2C[C@@H]21, Clc1ncc(Br)cn1 to produce CC(C)(C)OC(=O)N1[C@H](CNc2ncc(Br)cn2)C[C@@H]2C[C@@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.