Using COc1cc(OC)c(Cl)c(-c2ccc(C(=O)Nc3nc(C=O)c[nH]3)c3nccnc23)c1Cl, NCC(F)(F)F to produce COc1cc(OC)c(Cl)c(-c2ccc(C(=O)Nc3nc(CNCC(F)(F)F)c[nH]3)c3nccnc23)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.