Using Nc1ccc(Cl)c(Cl)c1, FC(F)(F)c1cnc(Cl)nc1Cl to produce FC(F)(F)c1cnc(Nc2ccc(Cl)c(Cl)c2)nc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.