Using [N-]=[N+]=[N-], CCn1c(=O)c2cc(C#N)cn2c2ccccc21 to produce CCn1c(=O)c2cc(-c3nnn[nH]3)cn2c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.