Using CSc1nc(Cl)cc(Cl)n1, FC(F)c1nc2ccccc2[nH]1 to produce CSc1nc(Cl)cc(-n2c(C(F)F)nc3ccccc32)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.