Using Nc1ccc(CN2CCCC2)cc1, Clc1ncc(Br)c(NCCc2c[nH]cn2)n1 to produce Brc1cnc(Nc2ccc(CN3CCCC3)cc2)nc1NCCc1c[nH]cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.