Using COC(=O)[C@@H]1CCC[C@@H]1C(=O)c1ccc(Br)cc1 to produce O=C(O)[C@@H]1CCC[C@H]1C(=O)c1ccc(Br)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.