Using [N-]=[N+]=[N-], Clc1nc(-c2ccccc2)nc(-c2ccccc2)n1 to produce [N-]=[N+]=Nc1nc(-c2ccccc2)nc(-c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.