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