Using [N-]=[N+]=[N-], CC(C)(C)OC(=O)COCCOCCOCCOCCOCCOCCBr to produce CC(C)(C)OC(=O)COCCOCCOCCOCCOCCOCCN=[N+]=[N-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.