Using COC(=O)C(C)(O)C(F)(F)F, [N-]=[N+]=CC(=O)c1cccc(Br)c1 to produce COC(=O)C(C)(OCC(=O)c1cccc(Br)c1)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.