Using [N-]=[N+]=[N-], CCOCCc1c(-c2ccccc2)nc(Cl)n2ncnc12 to produce CCOCCc1c(-c2ccccc2)n2nnnc2n2ncnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.