Using Cn1cc(Nc2ncc3cn[nH]c3n2)cn1, N#Cc1ccccc1CBr to produce Cn1cc(Nc2ncc3cnn(Cc4ccccc4C#N)c3n2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.