Using COC(=O)C1CN(C(=O)OC(C)(C)C)CCC1=O, N=C(N)Nc1ccc(Br)cc1 to produce CC(C)(C)OC(=O)N1CCc2nc(Nc3ccc(Br)cc3)nc(O)c2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.