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