Using CN(NC(=O)OC(C)(C)C)C(=O)c1ccc([N+](=O)[O-])cc1F to produce CN(N)C(=O)c1ccc([N+](=O)[O-])cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.