Using CCOC(=O)c1cc(Br)c(=O)[nH]c1C(F)(F)F, OCC(F)(F)F to produce CCOC(=O)c1cc(Br)c(OCC(F)(F)F)nc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.