Using CC(C)(C)OC(=O)c1cc(F)c(F)cc1F, OCc1cnc(Cl)c(Cl)c1 to produce CC(C)(C)OC(=O)c1cc(F)c(OCc2cnc(Cl)c(Cl)c2)cc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.