Using CN1CCCC1=O, CCCCCc1cnc(-c2cnc(-c3ccc(Br)cc3)nc2)nc1 to produce CCCCCc1cnc(-c2cnc(-c3ccc(C#N)cc3)nc2)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.