Using N#CC1(c2ccccc2)CCNCC1, Cn1c(Br)nc2c(Cl)ncnc21 to produce Cn1c(Br)nc2c(N3CCC(C#N)(c4ccccc4)CC3)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.