Using CCOc1c([N+](=O)[O-])cc2c(NC(=O)OC(C)(C)C)nn(C(=O)OC(C)(C)C)c2c1F to produce CCOc1c(N)cc2c(NC(=O)OC(C)(C)C)nn(C(=O)OC(C)(C)C)c2c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.