Using COc1cc(-c2cc3nccc(-c4cccc(C#N)c4)c3o2)cc(OC)c1OC to produce COc1cc(-c2cc3nccc(-c4cccc(CN)c4)c3o2)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.