Using CCCc1c(CBr)ncn2ncnc12, N#Cc1cccc(-c2ncc[nH]2)n1 to produce CCCc1c(Cn2ccnc2-c2cccc(C#N)n2)ncn2ncnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.