Using Cc1nc(-c2cc(NC(=O)CC(=O)C(F)(F)F)ccc2Cl)sc1C, [NH4+] to produce Cc1nc(-c2cc(NC(=O)C=C(N)C(F)(F)F)ccc2Cl)sc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.