Using O=c1[nH]nc2c(-c3ccc(Cl)cc3)c(-c3ccc(Cl)cc3)ccn12, FC(F)(F)CCBr to produce O=c1n(CCC(F)(F)F)nc2c(-c3ccc(Cl)cc3)c(-c3ccc(Cl)cc3)ccn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.