Using [N-]=[N+]=[N-], COCCOCCOCCOCCOCc1ccc(CCl)cc1 to produce COCCOCCOCCOCCOCc1ccc(CN=[N+]=[N-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.