Using Nc1ncc(-c2cccnc2)c2cccnc12, Cc1cccc(Br)n1 to produce Cc1cccc(Nc2ncc(-c3cccnc3)c3cccnc23)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.