Using FC(F)(F)c1cccc(-c2ccnc3ccnn23)c1, Cln1nnc2ccccc21 to produce FC(F)(F)c1cccc(-c2ccnc3c(Cl)cnn23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.