Using CC12CCC(=O)C=C1CCC1C2CCC2(C)C(C(=O)COCCCCCBr)CCC12, [N-]=[N+]=[N-] to produce CC12CCC(=O)C=C1CCC1C2CCC2(C)C(C(=O)COCCCCCN=[N+]=[N-])CCC12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.