Using CC1(C)OB(c2ccc(C#N)nc2)OC1(C)C, CCNC(=O)Nc1nc2cc(Br)c(F)cc2s1 to produce CCNC(=O)Nc1nc2cc(-c3ccc(C#N)nc3)c(F)cc2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.