Using Cn1c(-c2cccc(OC(F)(F)F)c2)nc(Br)c1C(=O)O, O=C([O-])[O-] to produce COC(=O)c1c(Br)nc(-c2cccc(OC(F)(F)F)c2)n1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.