Using O=C(c1ccc(Cl)cc1)c1ccc(CBr)cc1, Cc1n[nH]c2cnn(C(C)(C)C)c(=O)c12 to produce Cc1nn(Cc2ccc(C(=O)c3ccc(Cl)cc3)cc2)c2cnn(C(C)(C)C)c(=O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.