Using Fc1c(Cl)c(F)c(Cl)c(F)c1Cl, O=C1C(F)(F)C(F)(F)C(F)(F)C(F)(F)C1(F)F to produce OC1(c2c(F)c(Cl)c(F)c(Cl)c2F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C1(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.