Using O=C(OC(=O)C(F)(F)F)C(F)(F)F, Brc1ccc2[nH]ccc2c1 to produce CCOC(=O)c1c[nH]c2ccc(Br)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.