Using CC(C)(C)C(=O)CN1C(=O)C(NC(=O)OCc2ccccc2)CN(c2ccccc2F)c2ccccc21 to produce CC(C)(C)C(=O)CN1C(=O)C(N)CN(c2ccccc2F)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.