Using CC1(CCl)CN(c2ccc(Cl)cn2)C(=O)O1, [N-]=[N+]=[N-] to produce CC1(CN=[N+]=[N-])CN(c2ccc(Cl)cn2)C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.