Using CC(C)(C)OC(=O)Cc1cnc(NC(=O)C(C)(C)C)cc1CCBr to produce CC(C)(C)OC(=O)C1CCc2cc(NC(=O)C(C)(C)C)ncc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.