Using CCOC(=O)c1c[nH]c2ncnc(-c3cccc(N)c3)c12, OC(O)C(F)(F)F to produce CCOC(=O)c1c[nH]c2ncnc(-c3cccc(NCC(F)(F)F)c3)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.