Using COCCN1CCN(c2ccc(N3C[C@H](COS(C)(=O)=O)OC3=O)cc2F)CC1=O, [N-]=[N+]=[N-] to produce COCCN1CCN(c2ccc(N3C[C@H](CN=[N+]=[N-])OC3=O)cc2F)CC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.