Using OC(c1cc(F)cc(F)c1)(c1cc(F)cc(F)c1)c1c[nH]cn1 to produce Fc1cc(F)cc(C(c2cc(F)cc(F)c2)c2c[nH]cn2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.