Using COc1cccc2nc(C(F)F)[nH]c12, Clc1cc(Cl)nc(Cl)n1 to produce COc1cccc2c1nc(C(F)F)n2-c1nc(Cl)cc(Cl)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.