Using Cc1cccc2c1N(CC(=O)C(C)(C)C)C(=O)C(NC(=O)OC(C)(C)C)N=C2c1ccccc1F to produce Cc1cccc2c1N(CC(=O)C(C)(C)C)C(=O)C(N)N=C2c1ccccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.