Using OB(O)c1ccc(Cl)cc1, COC(=O)c1[nH]ccc1C(F)(F)F to produce COC(=O)c1c(C(F)(F)F)ccn1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.