Using O=C1COc2nc(Br)c(-c3ccccc3)cc2N1, FC(F)(F)CI to produce O=C1COc2nc(Br)c(-c3ccccc3)cc2N1CC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.